Hi, does anyone here ever experience the notification panel keep sliding down and up and down... WITHOUT ME EVEN TOUCHING THE SCREEN? Sometimes it will even just stuck halfway of the screen, and I have to lock my phone and unlock it again to make it return to normal? Does anyone gets me? Everything seems fine but the notification panel seems to have a mind of its own to annoy me. Occurs randomly most of the time, and really a pain when I'm typing or watching video, and it happens. Any idea what's wrong? Help.