when using a crossbow and placing a fireworks rocket in the off-hand slot, and applying the fireworks rocket to the crossbows. then throw the fireworks rocket that is in the off-hand slot and shoot the crossbow containing the fire works rocket, and open the inventory so the fireworks rocket is still attached to the crossbow when opening the inventory. even though on the first person's camera the fireworks rocket was fired, but when opening the inventory the fireworks rocket was still in the crossbow when opening the inventory. unless we move it to another inventory slot, then the fireworks rocket will disappear from the crossbow.