My Zenmuse H3-2D developed this problem after about 6 successful flights on my P2 - now have about a dozen flights in. The gimbal and camera start out perfectly level, but after a couple of minutes, the gimbal tilts badly to one side as if it's lost where level is. Rocking the P2 back and forth doesn't fix the problem, but it has corrected itself during the same flight. All firmware and software is up to date as far as I can tell and I have just done the stick calibration as described in this thread - viewtopic.php?f=8&t=11422 - because I developed the camera tilt thing after doing a calibration incorrectly. Thanks for any help - I searched and haven't been able to find an answer.