Custom smithing templates can't be shifted in the smithing table

When you add a custom smithing recipe with a custom template to upgrate your equipment you can't shiftclick to get the template into the smithing table. You have to put it manuel there. Once the template is in the rest of the items can be shiftclick inte the smithing table.

This example datapack adds a smithing recipe which can upgrade golden axes to iron axes uses sand as upgrade material and redstone as smithing template