Digital Wellbeing: App Timer doesn't work anymore

I have started using Digital Wellbeing again, but it doesn’t seem to work anymore. App timer for Firefox has gone beyond the 30-minute threshold, but nothing has happened, I can still open the app.

Has anyone else encountered this and knows a fix?

Weird bug. I have now changed the app timer to 25 minutes. Then the app got disabled. I then changed it back to 30 minutes, and it stayed disabled.