Running 2.9.1 on an APM 2.5 3DR quad. GPS has 3D fix, but the altitude is showing -70 million feet. The APM is in a 3DR case, with the foam insert to cover the barometer.
Flies fine in stabilize mode, but not in Alt hold, loiter, etc. This is new behaviour - it worked fine previously.
I'm flying in Canada, the temperature was near 0 Celsius. Could there be an issue with condensation in the barometer? Where do I look to determine what the barometer output is?
Thanks for any suggestions.