This lost message is sent isolated, or it is a part of several ones sent at the same time?
I ask for this because if several messages are sent in a row this is is somewhat expected. You will find examples of "sleep between send"

What also does make sense to me is that if happens at nodes, also should happen at the gateway.
I've experienced nodes being dropped by the gateway when a section of the network powers up at the same time.

How do you control your messages? Do you use only domoticz or are monitoring with myscontroller? (Take care with domoticz)

I would check the radio modules. Did you source them from China? I had similar problems and they where caused by fake nrfs only aggravated by one repeater.
My modules only had range to next room, with luck. Some only had 3mt of range.
I think the repeater feature can only be used it you have very reliable radio modules, for the gateway and the repeater itself, and I would stay away from nrf24 for that.

@neverdie Does it have compression or checksum of the payload? I'm not used to that library, but it seems some processing is done. First try with plain repeating characters or numbers to discard encoding issues.

@neverdie On platformio, what do you use for programming? A black magic probe?

And about the 255 payload, have you looked for a wrong sized variable or type? If you want me to give it a go on visual studio+resharper just send me a sample. I still don't have a programmer and still haven't received my nrfs so I would only look for programming errors.

I was thinking more on a service that also could monitor temperatures and control power. But for being able to do that, it must be running while the computer is down. And also, should be impossible to use the existing networking. So a complete node would be preferred. I guess the nrf52 dongle could be a nice candidate for this. Inserted on an internal USB port and perhaps also connected to the MB switches and LEDs port.

I just had this idea where I thought about adapting the Linux GW code for acting as a computer service for sharing to the mysensors network the internal sensors and/or PW consumption or on/off/sleep features of a headless server.
What I don't like is the fact that as the coms would be easier through the existing lan, as opposed to implementing a radio, it would be in fact a new independent gateway.
What do you guys think about? Perhaps someone already thought about this.

Do you think this board could be used for a wifi gateway?
https://es.aliexpress.com/store/product/Nrf52840-development-board-ESP32-development-board-Mini/2956052_32921001572.html

@NeverDie Thanks for your time and good work!
I was thinking on start fiddling with the nrf52, but after the reading I don't know if I would handle it.

In fact, I had updates blocked using a group policy, and it worked for a while. But someday I noticed that the PC was turning itself on while I was not there. I thought it was the cat hitting the keyboard so I deactivated mouse and keyboard wake up and powering while off. But it didn't help. I also discarded wake on lan because the PC was doing it even without lan cable.
One day I saw that updates where happening and I realized that windows was turning the computer on for it. And then this message saying "we'll run updates when we find your computer is so behind on them" appeared below the one indicating that I blocked then by group policy, in updates screen. And last week, the computer was up to date.
So that's the way it is.

Even if you create firewall rules, I think they'll surpass them for their sake. I have opnsense as router/firewall, and I saw that now mistersoft uses thirty party cdns for their updates, so blocking them may be also a problem.

If anyone is interested, that was my channel scan when I decided to migrate to 108

Starting Poor Man's Wireless 2.4GHz Scanner ...

Channel Layout
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|   +RRWRRWRWRWRWWWWWW+.                                                      ....                                             | 27
|   WWWWRWWWWRWRWWRWWW                                           ..      .........                                             | 26
|  .RWWWRWWWWWWRWRWWRW*                           .                      .......                                               | 26
|   +RRWWWRWWWWWWRWWWW*.                                                 .......                                               | 27
| ...RWRWRaRRWRWRRWRRRR..                                                      ...                                             | 29
|   aWWRWRWRRWRWRWWWWR-                                                 .....                                                  | 26
|   =WWWWWWRWWWWRWRWRWR                                                  ......                                                | 26
|   RWRWRWWWWRWRWWWWRW.                                                   . ......                                             | 27
|   *aRRRWRWRWRRWRWRWW-.                                                     ....                                              | 28
|...RWWRWRWRRWRWRWRRWRW..  .                                                 .....                                             | 29
|   WWRWRWWWWRWRWWRWRWW                                                 .........                                              | 26
|   WRWWWWRWRWWRWRWRRRa  .                                                   .....                                             | 27
|   RWRRWRWRWWWWRWWWWRW     .                                                .....                                             | 27
|   RWRWRWRRWRWRWRRWRWR.. .                                                      .                                             | 27
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|...WRWWRWRWRWWRWRWRWRR...                                               .........                                             | 29
|   RWRRRRWRWRRWRWRWRWW                                                  ...                                                   | 27
|   WRWWRWRWRRRRWRWRRWR                                                  .......                                               | 28
|   RWWRWRWRRWRWRWRRWRW                                                  ..   ....                                             | 27
|   RRRWRWRRWRWRWRRWRWR                                                  .........                                             | 28
|...*aWaWRWWRWaWRWWRWaa.. .                                              ....                                                  | 31
|   aWRWRRRRWRWRRWRWRWa    ..                                           ..........                                             | 27
|   WRWRWWRWRWRRWRWRWRR                                                 ..........                                             | 27
|   RWRRRRWaWRRRaWaWRRR                                                   ...... .                                             | 28
|   WRWWRWRWWWWRWRWWRWR.                                                 ..   ....                                             | 27
|...RWRRWaWRWRRWRWWWWRW... ..                                           ....    ..                                             | 30
|   WRRRRWRWRRWRWRWWRWR                                                  .........                                             | 27
|   RWWRWRWRRWaWRWRRWRW                                                 .. ....                                                | 27
|   WWRWRWRRWRWRWRRRaWa                                                  .........                                             | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
| ..RRWRWRRWRRaRaaWRRRR  .               .  .. .. .. ... ...   .  .  .. ... .. ...                                             | 29
| ..RRaRRWRRRaWRWRaRaWa..                  .  ..  .     . .      .  ..  ......... .                                            | 33
|   aRRRWRWRRWRWRWWRWRW   .                                              ..... ..                                              | 28
|  .RRaRaWaRRaWRWRRWRWR                                                        ...                                             | 28
|   RRWRWRWRaWRWRWWRWRW                                                     .....                                              | 27
|   WWRWRWRRRRWRWRRWRWR                                                 ...                                                    | 27
|   RRWRWRWRRWRWRRRaWRW                                                     ......                                             | 28
|   WRRWRWRWRRWRWRWWRWR                                                     ......                                             | 27
| . RRRaWaWRRRaWRWRRWRW                                                                                                        | 28
|   WWRWRWRWRRWRWRWWRW* ..                                                .......                                              | 27
|   RWRRWRWRRRRWRWRRRR- .                                                ..    ...                                             | 28
|   WRRWRWRWRRWRWRRRaR                                                      ......                                             | 28
|   +RRRWaWRRRRWRWRRRa- .     .                                          ........                                              | 28
|   +RWRRWRWRRWRWRWWaa.                                                  ..                                                    | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|   aaRaWRWRaWRWRWRRWRW.                                                 .... ....                                             | 28
|   aRRWaWRWRRWaWRWWRWa ..                                              .       ..                                             | 29
|  .RWRRWRWRWRRWRWRWWRW  ..                                             .......                                                | 26
|  .WRWRRWRWRWRRWRWRRWaa  .                                                 ...                                                | 28
|   aWRWRRWRWRWRRWaWRRRa                                                .     ....                                             | 28
|   RRWaWRRRRWRWRRWRWRRW                                                     .....                                             | 28
|   RRaWRWRaRaWRWRRWRWRW   .                                                ......                                             | 28
|   RWWRWRWRRWRWRWRRWRWR.                                                       ..                                             | 27
|  .WRWRRWRWRRWRWRWaaWaW...   ..                                            .. ...                                             | 28
| ..RWRWRRWRWRWRRWRWRRWR   .  .                                         .....                                                  | 28
|   RaWaWRaWRWRWRRWaWRR*.                                                     .....                                            | 29
|   RRRWRWaaRaWRWRRWRWRa      .  .                                       .........                                             | 28
|   RRWRWRWRRRaWRRRaWRW.                                                    ......                                             | 27
|.. WRRWRWRWRaWaWRRRaWa.                                                                                                       | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|   RRWRWRWWRWRWRRWRWR .                                                     ....                                              | 27
|   RWRWRWRRRaWRRRaRaW.                                                 .......                                                | 28
|   aRRRWRWRRWRWRWWRWRa..                                                .......                                               | 28
|   aaaRaWRRRRWRWWWWaW=.                    ..                          ......  ..                                             | 29
|   aWWRWRWRRRaWRWRRWa=.                         .                      ..                                                     | 30
|   WRWWRWRWRRRaWRWRRWR    .                                            ... .. ...                                             | 27
|   RWWRWRWRWRaRaWRRRaR .                .      . .                     ....                                                   | 28
|   WRWRRWRWRWWRWRWRRRa                     .                           ......                                                 | 29
|   aWaRRaRRWRRRRWRWRRW  .                                               ..                                                    | 28
|   WRWRRRaRaWRRWRWRWRR                                                 .........                                              | 28
|   RWRWRRRRWaWRRWRWRWR    .                                              . .....                                              | 27
|   WRWRWRRWRWRRRaWRWRR .                                                .........                                             | 28
|   RWRWRWWRWRWRRRRWaWR     .                                                ....                                              | 28
|   RRWRWRRWRWRWWRWRWR+                                                     ......                                             | 27
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|   *WRWRRWaWRWRRWRRRR+.   .                                                .......                                            | 29
|  .aaRaRaRRRWaWWaWWWaW. .               . ...  .  .  .. .. ..  . .  ..  ..  . ...                                             | 31
| . WRRRaWaRaaWRWaWRaWR  .                 .   .  .  .. .. .  .. ..  .  ..  . ....                                             | 30
|   RWRRWRWRWRRWRWRRWRW  ..                                                    ...                                             | 26
|   WRRWRWRWRRRaWRRRaWa.                                                     .....                                             | 29
|  .aWRRWRWRWRRWRWRWWRW+                 .. .                                 ..                                               | 27
|  .*aa*a*a**a*a*aaaaaaa      . ...........::-++WWWWRaa=:.               .. ....   ...... ... .......                          | 37
|. .*a*aa*a*aaaaaRaaa*Ra    ..............:-*RWWR*=:..                           ..    .........:-:::..                        | 33
|  .RWRWWRWRRRRRRWRWWRWR .  ..............::-+aRWW*+--::.                    ... .        ...........                          | 27
|  .WRWRWRaRaWRRaaRaRaRR                                                                                                       | 29
|  -RWRWRWWRWRWRRWRWRWRR                                                  . ...                                                | 27
|  -RWWWWRWRWWWWWWRWWRWW.......:.::........-++a+=-:....                     ......   ..... ..::=*+-.                           | 27
|  :****a*a*a*aa*aaaa*Ra   ..............::=+aRWWa*=:...                     ..    .... .......                                | 35
|  :RWRWWRWRWRWWRWRWRRWR..... .......:....::--:=----::...     .  ...........::::-..:....::.                                    | 27
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
| .-WaWRWRaWRWRWWaWRWRRW     .                                              ....                                               | 28
|  -WWRWRWRRWRWRRWRWRWRR                                                                                                       | 27
|   RRWRWRRWRWRWWRWRWRR.                                                    .....                                              | 27
| ..RRaWRWRRWRWWWWRWRWR-.                                                   ...                                                | 30
|  .aaWaWRRRRWRWWWWRWRW-...                                                                                                    | 30
|   RRaRaRaRRaWaRRRRRWRa                                                  ......                                               | 29
| ..*WWRWRWRRWRWRWWRWRW.                                                        .                                              | 27
|  .=RRWaWRRRaWaRRRRRWa                                                       ..                                               | 28
|   -RWRWRWRRWRWRRRaWRR                                                    ....                                                | 28
|   aRaRaWaaRaWRWRaWRWR.. .............    .                              . ....                                               | 29
|   RaRaWRRRaWRWRRWRWRW:            .             ..                          ..                                               | 28
|   aWRWRWRRRRWRWRRWRWW+..     .                                          .....                                                | 27
| . aWWRWRWWRWRWRRRRWRW-                                  .                ......                                              | 27
|   RRRWRWRWWRWRWRRRaWa=                                                   .    .                                              | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|   =RWRWRWWRWRWRRRRWRR:...                                               . ...                                                | 28
|   RRRWRWWRWRWRWRRWaWR-                      .                           ......                                               | 28
|   aRRRWRWRRWRWRWWRWRW   .                 .                             . .                                                  | 27
|   aRaRaWRRRaWRWRRWRWR.                                                    .....                                              | 28
|   *WWRWRWRRWRWRWWRWRW.       .                                                                                               | 26
|  .*RRWRWWRRRWRWRRWaWR*.        .                                          .                                                  | 28
|   =WWRWRWRWWRWRWRRWRW.       ..                                                                                              | 27
|  .*aaRaWaRRaRaWRRRRWR..                                                 .....                                                | 29
|  .aWRRRaWRWRRWRWRWWRWR      .                                                                                                | 28
|  .aRWWRWRWRWRRWRWRRWa=                                                  . ....                                               | 27
|  .-RRWWRWRWWWWRWRWR==:                                                                                                       | 27
|  .RaWRRRaWRWRaRaWRRR*-                                                  ....                                                 | 29
|   RWRWRRWRWWWWRWRWWWW:                                                    ....                                               | 27
|  :RaRaWRaWaWRRRaWRWRRa                                                    .....                                              | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|..RaWRWRRRaWRRRaWaWRRRa                                                   ....                                                | 29
| .aRRWaWRWRRWaWRRRRWRWa..      .                                               .                                              | 27
| ..WRRRaWRWRaRaRaRRaRaW .  .            .  .  .. .. ..  . .  ..  .  .  ..  .....  .                                           | 29
| .:aWRWRaRRWRWaaWRRRRRR.  .               .  .. .. .. .. .. ..  :  .. .. ..  ..  .                                            | 30
|  +RaWRWRWRRWRWRRWRWRWR                          ..                      ......                                               | 28
| ..WRRWaWRWRRWRWRWWRWRW                                                    .....                                              | 28
|  .RWRRRRWRWRRWRWRWWRWa         .                                              .                                              | 27
|  .WRWRWRRWRWRRWRWWWRR+        .   .             ..                     .. .                                                  | 27
|  -aWRWRWRaWRWRRRRWRRa+                                                  .....                                                | 28
|  -RRWRWRWWRWRWRWRRWaWR                                                 ..                                                    | 28
|..-WRWWRWRWRRRRWRWRRWRR                                                  ....                                                 | 28
|  -RWRWRaWRWRWRRWRWRWWR                                                  .     .                                              | 27
|  =RRWRWRRRRWRWRRRRWRWR                                                  ....                                                 | 27
|  -WRRWRWRRRRWRWRaWaWRR                              .                  ... .....                                             | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|  :RRWRWRWRaRaWRWRRWRWR                                                 ........                                              | 28
|. .WRRWRWRWRRWRWRWRaWaW                                                 ......                                                | 28
|  -RWRWWRWRWRWWRWRWRaWa.                                                ........                                              | 28
|  .RaWaWRaRaWRWRRWRWRRR.                                              .........                                               | 28
| .:WRaWaWRRRaWRWRRWRWRW   ..                                        .                                                         | 28
|  -RWRRWRWRRRRWRWRRWRWR                                          .     . .......                                              | 27
|...WRWRRWRWRWaaWaRaRRaR..                                               ..                                                    | 31
|  :aWRWRWRRWRWRRRRWRWRa                               .                       ..                                              | 28
|  :aaRaWaWRaWRWRWRRWRWR. .                     . .                       . ..... .                                            | 29
| .:WaWRaRaRaWRRWRWRRWRW   ..                                                   ...                                            | 28
| ..RWRWRRWRWRWRaWRWRWR=   ..                                                   ..                                             | 27
|...WRWRWRWRaWaRaaRaRaR    ..   ...                                            ....                                            | 30
|  :WRRWRWRWRRWaWRRRaWa:  ...                                              ........                                            | 28
| .:RWRRRRWRWRRWRWRWRRWa. ..                                                ......                                             | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
| ..WRWRRRRWRWRRWaWRRRa*  ...                   ..  .                       .......                                            | 28
|   RWRWRRRRWRWWRWRWRWW:  .               ..      ...                       ......                                             | 27
|  -RaWaWWRRRWRWRRWRWRWR  ...                                             ......                                               | 30
|  =WWRWRWRWRRWaWRRRRWRW  ...                                                   ...                                            | 27
|   -*RRWRWRWWRWRWRRRa=.                                                    .......                                            | 27
|  .RRWRRWRWRWWRWRWRRWa-  ...                                               ...                                                | 28
|  .aRaWRaWaWRRRRWRWRRR*  ...                                             .  ....                                              | 29
|..*RRWRWaaRRWRWRaWRWRWR  ...                                            ..       .                                            | 28
|  aWRRWRWRWRaWRWRRWRWRW   ..                                             .      ..                                            | 27
|..=aWWRaaRRWWWWRWRWWRWa......                                .....  ..  . ............. .                                     | 32
|   aaWRWRWRaWRWRRRaWaR.  ...                                             .........                                            | 29
|  .aRaRaWRRRRWRWRRWRWR-  ...                                               .... ..                                            | 28
|...RWaRRRWRWRRWRWRWRaW=  .. .                                            . ... ...                                            | 30
|   WaWRRRaWaWRRRaWRWRR=  ...                                             ..     ..                                            | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |
|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|  :aWRWRaWaRRWRRWRWRWW*   .                                    ..    .. ..                                                    | 28
|  :WRWRWWRRaWRWRRWRWRWW                                                       ..                                              | 27
|  *WRRWRWRWRRWRWRRWRWRR                                                                                                       | 28
| .+aWaRRRWRWaaWaWRWRaR*.  .            .  .   .  .  .     .  .  .. .. .. ...  .                                               | 31
|. -*a**R*Ra*RRWRWRaWaR*....... ....       .  .  .  .. .. .. .. .. .. ..........  .                                            | 36
|  -*RaWRRaaWRWRRRaWRWWR....:...:::.:::-::::::.:::...::::::.::::::...............   ......  .......... ........ ...... .    . .| 30
|. =aWRRRRWRWRRWRWRRRWWR... .::..:.............            . ......        .........                                           | 30
|..-aRWRWaWRRWRWRRRRWaWW..  .                                                 ...                                              | 33
|..:aRWWWWWRRWWWRRWRWRRa.....:.::....:::...::::..::::::...:::..............                                                    | 34
| ..RWWWWRWRWRRWRWWWWRWa.......................                .. ... ..     ...         .....                                 | 29
|...RaWRWWWRRWRWRRWaWRW+... ............  ... ..    ....            ..      ...                                                | 31
|.. WRWRaWRWRRWRWRWRRWR.                                                     ....                                              | 28
| ..RRRWWWWWWWWRWRWWWWR....::::...:----:...::::................ ....... ........                                               | 30
| ..RWRWRRRaWaWRRRaWaRR.  .                                               ......                                               | 28
|0         1         2         3         4         5         6         7         8         9         10        11        12    |

And that's the worse I get today:

|012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345|
|                             .  aRaRRRWRWaa ..                                                                                | 28
|                               .RRaRWWWWRRR                                                                                   | 26
|                                WRWWWWWRWWW   .                                                                               | 25
|                                RRWWWWRRRWR                                                                                   | 24
|                                :WWWWRRRWWW                                                                                   | 25
|                             ....WWWRWRRWWa .                                                                                 | 25
|                                :WWWWRWWWW-                                                                                   | 27
|                                +WWWRWWWWWR                                                                                   | 25
|                                WWRRRWWWWRR  .                                                           ..                   | 25
|                            ....aWRWRWRRRRR....                                                                               | 26
|                            ..:.RWRRWWWWRRW.:..                                                                               | 30
|   ...     . ...   .....    :...+WRRRRaRWWW....     ...     ..   ..   ..   ..                                                 | 29
|                            :...WWWWRaaRRaW-:..     ..                                                                        | 32
|                                RWWRRRRRWWR                                                                                   | 27

I'm using a new device so still I may have something to adjust in the scanner as I don't get the band being so clean. I've changed the old wifi AP for an ubiquity thou.