Do Not Disturb is not deactivating

Similar to this thread I found for the FP2, Do Not Disturb set to automatically activate in the night does not get deactivated in the morning. My Fairphone 4 is up to date on Android 12.

How did you set it up, maybe some detail may help others understand?

I simply activated the already set up ‘Sleep’ schedule. It worked fine when I first activated it.