I set an alarm for 8:55am and it never went off. At 8:58 it was saying that its 38mins until its due to go off.
Ice also had one time alarms just never set, and some issue with the stopwatch.
Alarms are important to me.
What app do you use?
No idea why GrapheneOS doesnt use the very nice and modern LineageOS apps. They are just AOSP with minimal additions.
Maybe it is some stupid license incompatibility as they want to keep the option to lock the OS down or something...
Using stock LineageOS apps on other systems doesnt work as they have wrong IDs and might have permission issues