The CubePiot service bulletins recommend setting log_disarmed to “1” so that errors in initialization can be identified.
I’m not sure what to be looking for as signs of trouble. I guess it could be anything. But if someone has some suggestions - it would be nice to read about.
As reference - here are the messages from one of my copters from power up to arm and then disarm.
MavLink messages on startup.pdf (59.8 KB)