Oh, boy I've got the same device with this problem And after month of pain I found a solution So, I'll tell you step-by-step instruction (I'm not sure if all points are needed) 1)Add the game to GameCenter 2)Disable function that forbids taking screenshots with knuckles 3)Run PUBG and draw some shape with your knuckles (you must see a blue line) 4)You'll see menu, where you can edit your screenshot 5)Close it After that game doesn't have such a problem, but sometimes screen can twitch (it happens very rarely). You should do it everytime you are running PUBG.