For a while I noticed that my phone would wake me up in the middle of the night with notifications even though I almost always remember to switch to mute my phone with silent mode every night before I go to bed. A few times now I noticed it would vibrate once at midnight; turns out my phone would unmute itself and go back to normal ringing off silent mode at exactly 12am (or rather, 00:00 because I have it on military time). Does this happen to anyone else? How do I stop this?