I wonder if this is the same as my gimbal issue? When the drone rotate in the Yaw direction the gimbal also goes down in the roll direction, when the drone stop its yaw rotation and stands still the gimbal slowly goes up again (roll) to its normal position.
This makes all videos totally unusable, the horizon is tilted to one side and then slowly moves up to a leveled out position.
In my case I'm pretty sure the gimbal has been involved in a crash, so i don't think its a software issue in my case. I have been looking at the gimbal and even dismounted the gimbals Yaw axis where the back motor is located but couldn't see anything out of the ordinary.
It means that the gimbal always moves in a roll movement when it is moved in the yaw direction, strange.