Hello I have had the Phantom 4 for several months without issue using an Ipad with the DJI GO app. I flew it on Sunday the 6th but come the 7th when I turned the drone on the app would crash. After messing around with settings and other things for a while I found that the app wouldn't crash while the controller and drone were off or if just the drone was off. I had the app open for 10 minutes while it was connected to the controller, but within 3 seconds of turning the drone on and the app acknowledging that everything was connected it would crash. I changed batteries restarted everything, fully charged everything but the problem persists. I used my android phone and the DJI GO app and everything worked fine; I got it to fly, take pictures and take videos. It seems the ipad version of this app had a software update recently that updated without permission, I believe this might be the problem but there is no way for me to undo the update. If anyone knows anything that can help I would greatly appreciate it.