I have noticed that when flying from my house in a city that my Mavic sometimes completely disconects or I lose controller function. It also seems to drift when hovering at times even after a semi recent compass and IMU calibration. I was flying tonight and Mavic seemed to get a mind of its own and went max altitude and began to fly away with no control. (a bit unnerving to say the least) I did restart controller and regain control. Seems like this happens about every 20 flights or so from this location anyone else have this issue at a specific location?