Verification builds:
1.19.51  | Windows: No
1.19.70.20 Preview | Windows: Yes
1.19.70.21 Preview | Windows: Yes
Java Edition: No
 
Summary:
Since a recent change, side-supported bells now break when a block is placed underneath or above

Repro Steps:

1. Place a bell on the side of a block
2. Place a block underneath or above the bell

Observed Results:
The bell breaks unexpectedly.
 
Expected Results:
The bell should remain in place, since it is attached at the side