Today I was testing a 2.5 APM with MP 1.235.
The aircraft (Ritewing ZII) flies under stabilized flight as well as manual -OK. When I switch to auto mode, the aircraft turns toward the first waypoint, but it heads downwards to what looks like a point near ground level. I tried switching between both absolute elevation as well as normal elevation with a height above ground about 600 feet, but the aircraft still heads toward a point on the ground.
The ground elevation displayed on the MP is accurate. I am using a Ublox GPS. The APM is mounted on the top of the plane (in the wind because of a lack of space).
I would appreciate any suggestions, please.