My wife has complained for some time that the alarm of the built-in timer in iOS 12 doesn’t go off when the time is up. I have never believed her until today when I saw it with my own eyes. It was obvious that the auto-lock feature in iOS 12 makes the timer just end quietly when the time is up if both values are set to the same amount of time. I have confirmed the same issue on my phone but I can’t find any other person reporting the same thing. Is it just us?

If my Apple Watch is connected to my phone the watch still makes a sound when the timer is completed so it feels like a classic race condition.

Apple, please fix!