Puzzle template blocks turn gray when hovered over in Code version vs no reaction in BP version

Functionality is different between code and bp versions of the puzzle template

1. Open a C++ Puzzle template
2. PIE and hover cursor over a block, block should turn gray
3. Open a BP Puzzle template
4. PIE and hover cursor over a block

Result: Block is not changed to a gray block

Expected: Functionality is the same between code and bp templates

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