Not all bows are consumed when crafting multiple dispensers when one bow was previously enchanted.

1. Craft a bunch of ordinary bows (or get from drops).
2. Use grindstone to remove enchantment from a bow.
3. Be sure to have enough other materials for plenty of dispensers.
4. Use recipe book and "craft multiple" button (Y on xbox) to craft dispensers.

Only some of the bow(s) are consumed. This might depend on the ordering of the bows in inventory. This might also happen if keep the enchantment on the bow, though enchanted bows are not supposed to be allowed for making dispensers.

This is sort of a exploit / duplication bug so I made it private.