For the longest time I have been running with the mute switch on all the time after noticing alarms would still play at whatever the "Ringer" volume was set to with "change with buttons" switched to on in "sound and haptics" in the Settings. I noticed randomly on iOS 12 and now 13 that if I snooze an alarm 1-2 times when it goes to play again I'll have overslept because it's going off silently. I don't know if it's a change in behavior with the mute switch or if it's more that because I have two alarms set 10 minutes apart they're interfering with each other if both try to go off at once somehow. Anyone have any input? Obviously I can just go back to turning the switch off and see if that fixes it. I think it started when I randomly forgot to turn it off after getting home from work and noticed it didn't affect alarms. So I started just leaving it muted since during the day I'll get notifications on my Watch or originally my FitBit that a call etc. was coming in.