Ever since the last update of DJI Fly app whenever i exit out and they try to fly again later i have sign in all over again. which really sucked when the train was coming and i didn't have time to sign in to shoot the train. so i was stuck at 90 feet. I signed in and then when the next train came the same thing happened again. i finally deleted the settings and setup the app again and the problem disappeared. awhile back i factory reset my phone and installed every thing. well now the problem is back again. I set the app from scratch. i guess I'll have to do it again. anyone else with this annoying problem?