This is really frustrating. All is good, even in bright sun, when I start to fly. After 7-10 minutes flying, my screen goes so dim I can no longer see any image, menu selections, map, etc. I've read a number of posts elsewhere with Mavic and other DJI drones. Consensus seems to be something about the phones battery heating and dimming the screen to save power?? Why would the GoFly app be any different from any other app? Youtube doesn't dim the screen? This really makes it impossible to fly the drone. Thoughts??