Having all the items to craft a dispenser (7 cobblestones, 1 bow and 1 redstone dust) in the inventory and clicking "Dispenser" in recipe book (assuming it's available to craft) will put the ingredient for a "Dropper" (same as "Dispenser" but without the 1 bow in the center).

This only happened with bows that were damaged and then repaired with other ones to make a not damaged bow.

I'm not having this problem with bows that weren't damaged before.

Putting the items in the crafting bench manually works normally.