How to fix random phone freezes after update to Windows Phone 8.1?

[WPCentral Question]

I have a Lumia 920. After updating to 8.1 my phone randomly freezes. The screen goes blank and the only way to return the phone to life is to do a soft reset (volume down + power). Does anyone know how to fix the issue?

 

[Disturbed_Angel]

I am not familiar with this issue, however, first suggestion I have is to backup the device, and then wipe and restore.