I experienced something strange, flying with Phantom 4 Pro, got message on iPad Air 2 that it is going to shut down because of heat, and it shut down. I returned the bird and land. after a while when the iPad cooled down wanted to fly again but camera was not initializing properly and had no tilt function, the camera was just "loose" I tried to reset the settings in DJI Go 4, but nothing. Then after several battery in/outs on/off's suddenly the camera functioned again. Flew again today 3 batteries and no problems.