I have some sketchy pixhawk behavior that I hope someone can help me localize. I have noticed it 3 times now, and it is rather nerving. 2 times it has been in Auto and 1 time in Loiter. The hex starts fine and flies steadily and controlled, but then suddenly it picks up speed, banks drastically (arround 35 degrees) and goes completely of track.
Looking through the logs (attached) I can see there are GPS-0, GPS-1 and GPS failsafe errors. Can someone explain what causes these errors, considering that they only appear occasionally?
Is it pixhawk settings / calibration?
Is it faulty hardware, pixhawk, gps/compass-module or perhaps wiring?
Regardless of what the issue is I am also very puzzled by the fact that it reacts with picking up speed and banking as drastically as it does. The flightplans I have used has specified speed to 2 or 3 m/s. So what is allowing it to exceed this speed?
I have attached a log file. Hope someone can provide some input that can help me resolve this issue.