BlackBerry priv: double tap to wake up isn't working All of a sudden from yesterday morning, double tap screen to wakeup the phone isn't working. I read few forums where I understood even hard reset isn't working. 

Please help to solve this issue.
This got fixed automatically this morning. It was clearly not a software issue as there was no update. I suspect it might be the cause of placing the phone's screen face down few days before this issue, which got fixed when I stopped doing so.