On my Mavic Pro. I am using my ipad mini4 and it has been perfect. today the ipad did an update on itself. so I went out and flew , so at about 200 or 300 feet out and at 175 feet high . the app said warning poor radioo connection.. But the remote and the app had full strength on the radio connection graph, i brought it back and restarted everything and flew again , same thing but lost video feed, and lost connection said the app. . so it  finally reconnected and i brought it back. i tried it with my samsung galaxy s5 and it didnt do that. is it my app on the ipad or the mavic pro messing up.

Dleate the app and reinstall and see if it happend again.