I have the Mavic PP, and so does a friend I fly with. Both drones have a continued issue of level gimbals. I have given up running a gimbal calibration as that always completes fine and so does the IMU. But about 1/2 of the flights I have made, the first thing I do is manually adjust the gimbal to get it level. Having the guides on helps on this BTW.
My gimbal every so often will also flick to the side, mainly to the right. Does it maybe twice on a 15 minute flight, and so far easy to edit out.
As I don't trust the AF point to stay in place when going between Stills and Video, I check mine a lot and thus you will see the slight twitch as the camera refocus goes on.
The Mavic with latest firmware (last time I read) with djigo4 doesn't hold the AF point when you hover, if the camera is AF not MF. So my technique is the hit the AF point as I start to fly, then switch to MF as I know I will be hovering a lot as I am stopping to take stills.
But the gimbal does make some strange moves on it's own.
I am also surprised more folks don't complain on the grainy appearance to the video when you move the gimbal up or down (not yawing to the side). I see this most of the time I move the gimbal up or down when filming (2.7 K). It's very slight, but still there and doesn't happen with the Spark (my only other DJI drone). I have seen it often on videos posted here, so know its not just my Mavic.
Paul Caldwell