I find that just going to the Settings->Sounds->Ringtones menu and just selecting various ringtones to hear them play will usually wake the sound back up.
My phone just started doing this this afternoon. Does anyone know what causes this to occur?
Sent from my DROID RAZR using Tapatalk 2
Bzzzzzzz. Bug.
I've only noticed it occasionally when waking the phone up from sleep. Haven't noticed it cut out in the middle of an app yet.