Tilt rotor VTOL nose down and lose altitude after transition

When I transition from Qloiter. To FBWA everything is perfectly fine it holds altitude Rock solid… So no physical problems with the plane or trim… But when I transition from Qloiter to FBWB after the transition it slowly starts losing altitude even with full back elevator for I think it was about 1,500 ft and then it slowly started to climb and then FBWB seemed to operate and be fine after that… It’s like it has a calibration time or something after the transition …
I’ve seen a bunch of post people mentioning this … Is this a bug?
I’m probably just going to transition into FBWA from now on anyways, just curious…

Thanks
Scott v.

Soooo… I did an auto tune and it completely fixed this problem… :partying_face: