There is also a bug in iOS that disables the sound of alarm/timer from time to time. The alarm goes off with the screen showing the alarm but no sound at all.

There is also a bug in iOS that disables the sound of alarm/timer from time to time. The alarm goes off with the screen showing the alarm but no sound at all. In my case it usually reappears every month or so and is only fixed by rebooting. It’s not related to system sounds because I had checked the alarm settings a few times Wondering if it’s only me.