When you put items in a crafting table and select something, the items in the crafting table disappear.
See youtube video or attached video.
If added, new recipe system will delete additional resources when changed
Recipe Book - Materials lost when selecting a recipe
Items get deleted in Craftingbench
item deletion glitch
New crafting interface deletes items from crafting table
Items get deleted when the inventory is overflowed by using the recipe book to return items from a crafting table.