@zen85 I think @tekka implemented some security functionality in his bootloader but I believe it relies on a personalized atsha204a due to size limitations. And does not support encryption. But I might be out of date on that topic.
as soon as i burned a new bootloader it worked. watchdog does not like old bootloader and since mysensors is using that for rebooting it fixed my issue.
I faced same issue and was able to solve it by doing a proper presentation of S_INFO widget, as described in sample sketch: https://www.home-assistant.io/integrations/notify.mysensors/
The error message is quite misleading.
