Editor crashes when using transforms menu

[samhermes]

Description of the bug

When using the Query block, if a user opens the transforms menu, the block will crash when they hover over one of the options.

Steps To Reproduce

1. Insert a Query block
2. Select the Query block
3. Click on the Query block icon in the block toolbar to open the transforms menu
4. Hover over one of the options (defaults to Columns and Group blocks)
5. The editor crashes

Additional Information

The deduplication logic is running when a user opens the transforms menu, as the transforms menu uses a copy of the current block to display what the transformed block will look like.