The bell can be a bit glitchy sometimes it works and sometimes it doesn’t.
If I break the bell and put it back in the same place it usually works.
I have also found a glitch where the game does the complete opposite and breaks blocks.
Have you checked your sound is not muted on your device or the game itself.
Sorry for the inconvenience I did try to search but was I put nothing came up.
This is not a bug it is a feature.