Like many other reviewers, I am also having trouble with the timer feature and alarm clock. Please see below: 1. Timer works at times and doesnt at other times. The set time passes and timer goes into negative time but doesn't warn me. 2. When my alarm goes off, my screen doesn't turn on. I have to physically wake up my screen to be able to snooze or stop alarm. This happened after upgrading to One UI 4.0 (Android 12).