My setup is as follows
Easystar w brushless
APM with mediatek 1.6(updated firmware yesterday, went fine)
software is the 2.012 you get when you do "upload firmware" in the planner.
Auto works like this:
I make a a few waypoints, same alt (80 meters) and a few hundred meters apart (a triangle shape for example)
I take of on manual in some direction. Switch on "auto" and the plane make its way up to 80 meters and heads off to WP1.
After a circle around WP1 it heads of to WP2 but after a few seconds it looses alt in a "stairway" fashion but the direction to WP2 is correct. The throttle comes on and off during this.
Just before the plane reaches ground i can save the day by switching to RTL. Motor kicks in and up to 80 meters again and heads back home and loitering above my head.
I have checked the waypoints in the planner by read it back and it looks correct. Always 80 meter height.
Have anyone else had this experience?
All the best