Custom Model Not Rendering In Head But Will In Hand?

I have tried to create a custom armor head item, and it uses a custom 3D model, I've specified the model for the item_model field, and the model when equipped field, here's my code: { "pools": [ { "rolls": 1, "entries": [ { "type": "item", "weight": 1, "name": "minecraft:stick", "functions": [ { "function": "set_count", "count": 1 }, { "function": "set_components", "components": { "minecraft:equippable": { "slot": "head", "equip_sound": "entity.blaze.shoot", "model": "custom_items/backrax_mask", "dispensable": true, "swappable": true, "damage_on_hurt": true }, "minecraft:max_stack_size": 1, "minecraft:max_damage": 60, "minecraft:attribute_modifiers": [ { "id": "burning_time", "type": "burning_time", "amount": -10, "operation": "add_value", "slot": "head" } ], "minecraft:item_model": "custom_items/backrax_mask" } }, { "function": "set_damage", "damage": 0 } ] } ] } ] } Is there a reason why it shows up as the correct item in my hand but not when worn? Are sticks an unusable equipment item?