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iOS has had alarm issues for years. Sometimes my alarm will go off silently for no obvious reason (e.g., does not depend on whether phone is on silent or not -

iOS has had alarm issues for years. Sometimes my alarm will go off silently for no obvious reason (e.g., does not depend on whether phone is on silent or not - alarm should sound anyway). It happens so intermittently that I've never managed to figure out reproduction steps. Nevertheless, it's caused me problems enough times (missed trains to London, for example) that nowadays if it's really important for me to get up I'll always set a backup alarm on a different device (even a good old alarm clock). I really wish Apple would fix it.

woutr_be 6y ago
This happens to me so many times, sometimes I will wake up about 30 minutes after my alarm was supposed to go off. I've always wondered if I was somehow turning of my alarm while waking up and instantly falling back asleep or if my alarm just never went off.
wrycoder 6y ago
I updated to 13.7. I have the Bedtime alarm set for 7:30 AM. It went off at 3:00 AM the next morning. I’m pretty deaf, so awoke to my wife kicking and yelling at me. It took awhile to fumble it off. Why? And why 4 1/2 hours difference? In the morning, I screwed around with it for a bit and got it reset to 7:30. Or so I thought. It went off again at 3:00 PM. More screwing around. I suspect it’s somehow related to the fact I have the phone set for 24 hour time. Seems to be ok now, but I still have to update to 14.