Hi. My DJI Go 4 App Has Stopped while Mavic Pro drone is 500+mtrs away and 110mtrs in altitude, it happened at the beach in UK. Im using Note 4 and 700 firmware. What happened is, the drone is steady and recording 4k then gimbal just flicked upside down and out of focus for a few seconds and i tried to stop recording but the app is not responding, then after awhile the app stopped working(exit) . Does it happen to anyone and what to do when this happens? Any help or suggestions would be appreciated?