Why decreased the altitude when RTL?

Hi,
Like your other video with pixhawk, you have a ton of problem :

SAFE appears when the vehicle thinks its armed, but the sensors_enabled flag says they are not.
ie something is preventing motor output, even though the vehicle thinks its armed.

  • You got disarmed and armed in fligth ! Really crazy

You fly a dangerous plane … Fix these problems first IMO ! May be a good start is to rebuild from beggining !