node-tf2 backpack not updating

[apibot]

After successful smelting/crafting, tf2.backpack is not getting updated. 

let scraps = inventory.filter(item => item.name == "Scrap Metal")
let recs = inventory.filter(item => item.name == "Reclaimed Metal")
//I have to use inventory from getInventoryContents because tf.backpack is not updated

if (scraps.length > 12) {
	let craft = Math.floor((scraps.length - 12) / 3)

	for (let i = craft; i > 0; i--) tf.craft(scraps.slice(0, 3))
}

also this only craft 1 reclaimed

[Dr. McKay]

You can only perform one craft at a time; sending that many craft requests will get dropped. You should call craft(), then wait for the craftingComplete event before you craft again.