Haven't heard of to many issues of this happening. Were you in the camera mode for FPV or running ground station when it happens. Does your screen on your phone or tablet go black first or it just reverts itself to what window?
sir yes iam in camera mode for fpv, while flying it will just go back in the main menu, i just push camera button so that i can return to fpv mode, sometimes 5-6 times while flying , for your info also iam using android version , note 4 samsung
and also if preview quality is set to 640x 480 30 fps and 15 pfs my camera view is pixelized, so i setcit only to 320x 240 at 15 pfs only
Michael, I would delete the app from my phone or tablet And go directly to DJI downloads for your model of quad and get a clean download and give it a try. Sounds like a hiccup in the app itself or the phone. That might correct the issue. Worth a try. Good luck!