LG G4 screen locks after phone call
I have an LG G4. I recently received the marshmellow update. Since then, the screen has, at times, been unresponsive. After almost every phone call is done, the screen remains blacked out and will not respond to touches. I am unable to hang up from the call. I have tried pressing the on/off button, holding it down, doing that while swiping the screen... All without success. When I hold down the on/off button, I can feel the phone vibrate when the prompts for "restart", "turn off", & "turn on airplane mode" should come on. Also, a few times, when I have received a call, the screen has remained blacked out while the phone was ringing, so I was unable to answer.