This happened starting yesterday, where if I blocked the rear facing camera (the one facing you when you use the phone), the screen would turn black/off. I install nothing related to anything like this, hell, I haven't installed anything in a week - just out of nowhere, if I block the rear facing camera, the screen goes off, unblock it, screen comes back on. I rebooted the phone, and now the behavior is gone - but I can't help but wonder, what in the world just happened. My phone was requiring the camera unblocked in order to use it? Does anyone know what might have caused this behavior? Thanks in advance!