Updated my phone yesterday to the new 4.3. Today at work sitting on my desk, the phone randomly lights up. This is not the hover for status action, this is light up as if I pushed the button (which I'm not). I use the face recognition unlock and this shows when it turns on, then determines it can't see my face then goes to the numeric unlock pad. After a few seconds, it cuts back off. I've never had this happen before. Any thoughts? Oh, this happens about every 20-25 minutes.