There's a problem with crafting a fireworks rocket with a star where when the recipe is made with a level 1 Flight Duration (use of one gunpowder) he recipe cancels out and makes the firework star a black small ball when using a different star.

Ex. When crafting a firework with a pink star-shaped firework star with only 1 paper and 1 gunpowder, the firework results in a black small-ball firework.

The pattern only works when using 2-3 gunpowder to increase flight duration.