You can craft Creeper-shaped firework stars but impossible to craft Creeper-shaped firework rocket

I thought I can finally make a tutorial of how to make a creeper-shaped fireworks

 

It's possible to craft a creeper-shaped firework star but when you try to craft it to a firework rocket with the creeper-shaped firework stars

 

They always return back to normal (Small Ball)

 

But when use a tool that can edit an item's data

They work, the creeper-shaped firework works just like in the Java Edition, but still unobtainable and impossible to craft

 

EDIT: this bug also happened to other rocket types such as Large Ball and Star-shaped