Has anyone noticed a problem with Viber (video call?) During a video call, the screen suddenly goes black and freezes, nothing can be done, tapping on the screen does not work, clicking the power button same. After many attempts, it will finally turn on, but the conversation has the camera turned off, you have to turn on the camera in the conversation again. Today, with a 15 minute video call, it happened 3 times. In the black screen, the caller can still hear me, I can hear the caller. Well, only the camera turns off and the screen goes black and freezes.