Loss of Non-Call Audio on internal Speaker after update to B21

[Core2idiot]

I recently upgraded to B21, and after a few hours media audio stopped working and notification audio has artifacts but these issues are only on the internal speaker but call audio still works. I've tried a factory reset, along with a variety of other debugging steps. Has anyone else had these issues?

 

[GrayWolf]

Fortunately for me, my device is not showing any signs of this problem. If you've wiped the phone and the problem persists, I'd suggest contacting ZTE Support to see if they can help you out. You can also check out their 'Z-community' forums.

Good luck!