My phone loses all output sounds, including alarm, randomly. I have yet to figure out why because sometimes I can go through almost a day without the issue and sometimes it happens 2-3 times a day. And when it happens, nothing I do seems to be able to get the phone to produce a sound. My only solution is to restart the phone and everything will be back to normal. I've checked the sound or do not disturb setting, they are normal and I've not blocked any app. It's really annoying because I have missed an alarm in the morning as there was no sound. Please share if you have any idea what's happening or how to fix this issue.