[BUG] Bug with deleting case rules making board unmodifiable

[TreeSnowFence]

Description

When you delete the node preceding the use of a case rule, the spaces on the board that the case rule affected become unmodifiable. While it seems that this bug is for case rules in general, it is confirmed to exist in binary, skyscrapers, and sudoku

Steps to Reproduce

Open a puzzle.
Do 1 step of the puzzle.
Use a case rule.
Delete any board node preceding the use of the case rule

Expected Behavior

The empty squares on the board should still be modifiable.

Screenshots

Puzzle Files

No response

Additional Context

No response