When hovering over an item in the Recipe Book and then hovering over the Inventory, the crafting recipe still appears in the Crafting Table grid, which can get me confused with what I am crafting, as the cursor also always hovers over the recipe book when using a Crafting Table.
Steps to Reproduce:
Enter a Crafting Table
Move the cursor over the Inventory
Observe that the recipe is still shown in the grid.
I originally thought that it would show if you press on the item in the recipe book, and if you just hovered over that item, it wouldn't show anything.