Reproduce:
Put in crafting table: 1 firework star|64 paper|64 gunpowder.

Shift click items out.

Expected:
Get 3 small ball fireworks leaving 63 paper and 64 gunpowder in the table.

Actual:
Get 3 small ball fireworks and 2stacks+61 effectless fireworks.

Why this is to be expected:
Put in 64 wood|32 wood in a crafting table. Shift click -> you get 32 pressure plates. If it worked like the fireworks you would have 32 buttons as well