The map cloning recipe only shows in the recipe book when at least 8 inventory and/or crafting slots are occupied by empty maps

Because the map cloning recipe use crafting_transmute recipe, which means it can display in recipe book. But it has strange display behavior.

How to reproduce

• Take a map (“filled_map”, not “Empty Map”).

• Open the crafting table screen and enable the recipe book.

• Increasing the amount of the empty map in inventory (also includes crafting gird).

• Seeing the recipe display in recipe book.

Expected Result

Because map cloning requires at least one empty map, if here is one empty map in inventory, you can clone map, the recipe display should display this recipe.

Observed Result

The map cloning recipe display only exists when here are at least 8 empty map. I attached a video to show it.