@keithellis This is the log after I reload the integration in HA. Don't know if this is useful.
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.Energy Meter 8 1] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 8, 1, 17) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.Energy Meter 8 1] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 8, 1, 18) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.TemperatureAndHumidity 4 0] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 4, 0, 1) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.TemperatureAndHumidity 4 1] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 4, 1, 0) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.Sensebender Micro 6 1] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 6, 1, 0) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.Sensebender Micro 6 2] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 6, 2, 1) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.TemperatureAndHumidity 3 0] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 3, 0, 1) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.TemperatureAndHumidity 3 1] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 3, 1, 0) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.Energy Meter 9 1] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 9, 1, 17) from platform sensor
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device.Energy Meter 9 1] deleted ('5629f2f7535b66d050ad7d9cbd60e936', 9, 1, 18) from platform sensor
2021-10-08 17:31:21 INFO (MainThread) [mysensors.task] Stopping gateway
2021-10-08 17:31:21 DEBUG (SyncWorker_3) [mysensors.persistence] Loading sensors from persistence file /mnt/data/dietpi_userdata/homeassistantmysensors.json
2021-10-08 17:31:21 INFO (MainThread) [homeassistant.components.climate] Setting up climate.mysensors
2021-10-08 17:31:21 INFO (MainThread) [homeassistant.components.cover] Setting up cover.mysensors
2021-10-08 17:31:21 INFO (MainThread) [homeassistant.components.light] Setting up light.mysensors
2021-10-08 17:31:21 INFO (MainThread) [homeassistant.components.binary_sensor] Setting up binary_sensor.mysensors
2021-10-08 17:31:21 INFO (MainThread) [homeassistant.components.sensor] Setting up sensor.mysensors
2021-10-08 17:31:21 INFO (MainThread) [homeassistant.components.switch] Setting up switch.mysensors
2021-10-08 17:31:21 DEBUG (SyncWorker_2) [mysensors.persistence] Saving sensors to persistence file /mnt/data/dietpi_userdata/homeassistant/mysensors.json
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.helpers] Node 0 is missing sketch name
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.gateway] discovering persistent devices: defaultdict(<class 'list'>, {'sensor': [('5629f2f7535b66d050ad7d9cbd60e936', 8, 1, 17), ('5629f2f7535b66d050ad7d9cbd60e936', 8, 1, 18), ('5629f2f7535b66d050ad7d9cbd60e936', 4, 0, 1), ('5629f2f7535b66d050ad7d9cbd60e936', 4, 1, 0), ('5629f2f7535b66d050ad7d9cbd60e936', 6, 1, 0), ('5629f2f7535b66d050ad7d9cbd60e936', 6, 2, 1), ('5629f2f7535b66d050ad7d9cbd60e936', 3, 0, 1), ('5629f2f7535b66d050ad7d9cbd60e936', 3, 1, 0), ('5629f2f7535b66d050ad7d9cbd60e936', 9, 1, 17), ('5629f2f7535b66d050ad7d9cbd60e936', 9, 1, 18)]})
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.helpers] Discovering platform sensor with devIds: [('5629f2f7535b66d050ad7d9cbd60e936', 8, 1, 17), ('5629f2f7535b66d050ad7d9cbd60e936', 8, 1, 18), ('5629f2f7535b66d050ad7d9cbd60e936', 4, 0, 1), ('5629f2f7535b66d050ad7d9cbd60e936', 4, 1, 0), ('5629f2f7535b66d050ad7d9cbd60e936', 6, 1, 0), ('5629f2f7535b66d050ad7d9cbd60e936', 6, 2, 1), ('5629f2f7535b66d050ad7d9cbd60e936', 3, 0, 1), ('5629f2f7535b66d050ad7d9cbd60e936', 3, 1, 0), ('5629f2f7535b66d050ad7d9cbd60e936', 9, 1, 17), ('5629f2f7535b66d050ad7d9cbd60e936', 9, 1, 18)]
2021-10-08 17:31:21 INFO (MainThread) [homeassistant.components.mysensors] Adding new devices: [<Entity Energy Meter 8 1>, <Entity Energy Meter 8 1>, <Entity TemperatureAndHumidity 4 0>, <Entity TemperatureAndHumidity 4 1>, <Entity Sensebender Micro 6 1>, <Entity Sensebender Micro 6 2>, <Entity TemperatureAndHumidity 3 0>, <Entity TemperatureAndHumidity 3 1>, <Entity Energy Meter 9 1>, <Entity Energy Meter 9 1>]
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 8 1: value_type 24, value = 149
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 8 1: value_type 18, value = 0.1490
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 8 1: value_type 17, value = 758
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 8 1: value_type 24, value = 149
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 8 1: value_type 18, value = 0.1490
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 8 1: value_type 17, value = 758
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: TemperatureAndHumidity 4 0: value_type 1, value = 93.4
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: TemperatureAndHumidity 4 1: value_type 0, value = 19.2
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Sensebender Micro 6 1: value_type 0, value = 20.8
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Sensebender Micro 6 2: value_type 1, value = 67
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: TemperatureAndHumidity 3 0: value_type 1, value = 83.6
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: TemperatureAndHumidity 3 1: value_type 0, value = 18.7
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 24, value = 266854
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 18, value = 266.8540
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 17, value = 256
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 24, value = 266854
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 18, value = 266.8540
2021-10-08 17:31:21 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 17, value = 256
2021-10-08 17:31:21 INFO (MainThread) [mysensors.gateway_tcp] Trying to connect to ('192.168.54.25', 5003)
2021-10-08 17:31:22 INFO (MainThread) [mysensors.transport] Connected to <_SelectorSocketTransport fd=46 read=idle write=<idle, bufsize=0>>
2021-10-08 17:31:22 DEBUG (MainThread) [mysensors.transport] Receiving 0;255;3;0;14;Gateway startup complete.
2021-10-08 17:31:22 INFO (MainThread) [mysensors.handler] n:0 c:255 t:3 s:14 p:Gateway startup complete.
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.gateway] Node update: node 0 child 255
2021-10-08 17:31:22 DEBUG (MainThread) [mysensors.transport] Sending 255;255;3;0;20;
2021-10-08 17:31:22 DEBUG (MainThread) [mysensors.transport] Receiving 0;255;0;0;18;2.3.2
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.gateway] Node update: node 0 child 255
2021-10-08 17:31:22 DEBUG (MainThread) [mysensors.transport] Receiving 9;255;3;0;21;0
2021-10-08 17:31:22 DEBUG (MainThread) [mysensors.transport] Receiving 9;1;1;0;17;463
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.gateway] Node update: node 9 child 1
2021-10-08 17:31:22 DEBUG (MainThread) [mysensors.transport] Receiving 9;1;1;0;24;277598
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.gateway] Node update: node 9 child 1
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 24, value = 277598
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 18, value = 266.8540
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 17, value = 463
2021-10-08 17:31:22 DEBUG (MainThread) [mysensors.transport] Receiving 9;1;1;0;18;277.5980
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.gateway] Node update: node 9 child 1
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 24, value = 277598
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 18, value = 277.5980
2021-10-08 17:31:22 DEBUG (MainThread) [homeassistant.components.mysensors.device] Entity update: Energy Meter 9 1: value_type 17, value = 463
Some of these sensors do not exist any more, for example Energy Meter 8 1