The Bug:

The recipe book sometimes doesn't detect items placed in the crafting grid.

It seems that when you drag the items before placing them into the crafting slots, the recipe book doesn't detect them.

Steps to Reproduce:

1. Obtain a stack of oak planks and switch into survival mode.
2. Open your inventory and then open the recipe book.
3. Make it show that the recipe book only displays craftable recipes.
4. Place the planks into the crafting grid.
5. Constantly switch the planks into different crafting slots until the recipe book fails to detect them.

Observed Behavior:

The recipe book sometimes doesn't detect items placed in the crafting grid.

Expected Behavior:

The recipe book would always detect items placed in the crafting grid.