I just had issue which could cause a crash quite likely. The issue was found when the AUTO mode was accidentally switched on. Drone started to descend very fast and thus I quickly took over with manual control. This happened after re-flashed 3.6-dev and without any mission uploaded.
The error on Logs says “skipping invalid cmd #0” and its repeated about every 20ms until the AUTO mode was changed off. Its going through the commands “forever” until that and the desired height is set to “0”. Because of the desired height it starts to descend at maximum speed and that causes high risk of crash.
In my opinion it should it stay at hover at current location/height when its skipping multiple commands in a row like in this case
not allow the AUTO mode to be enabled in first place
Cause a failsafe
Log from the flight: