[C2] Alarm randomly goes silent

[frederikf]

For me, it seemed system sounds in general were silenced, this work around mentioned here seems to have fixed it for me (working ok for the last week or so):

Vibration crashes, causes (?) lags when activating an app's top menu

One workaround that we just shared @ Helsinki support session is to disable some common vibra places. So from Settings → Sounds and feedback For the top Vibration combo box select “Never” Disable “Touch screen vibration” from “Feedback” section.