On the bench: When FBW_A is enabled, all control surfaces level off when I tip the plane 20 degrees up and roll it about 30 degrees right. When stabilize is enabled, all surfaces are level when the plane is level.
In the past, I've seen this load of APM2 (version 2.40) operate FBW_A and Stabilize agree on where level is. Not today, though! You should have seen the flight!
How could these two modes not agree on where level is? How can I fix it? Does FBW have some memory of trimming I don't know about that stabilize ignores?