I had an issue with my mini 2 on holiday, mostly whilst using yaw. It would jump and lose frames in the video making it look choppy. I updated firmware whilst I was there but it persisted. I had calibrated and adjusted my gimbal settings to make the controls less sensitive and more forgiving but didn’t seem to improve things. I used the footage that hopefully wasn’t too bad but lost a lot of good stuff. 
I normally use ND Filters but took it off to see if that made a difference but it didn’t! It wasn’t windy and I didn’t have the gimbal pointing above 0 degrees and whats more confusing since coming back to Blighty it seems to have disappeared… for now! Anyway I hope you enjoy what I had left and are not too fussed by the judder. 