The bug

Fireworks play footstep/climbing sounds when they travel upwards through Vines, Weeping Vines, Twisting Vines, or Cave Vines. This is most easily demonstrated with Twisting Vines, so that’s what I’ll use for the “steps to reproduce” section.

Steps to reproduce

1. Start a new Creative world.

2. Obtain Warped Nylium, Twisting Vines, Bone Meal, and a Firework from the inventory. (Firework duration does not matter for this bug.)

3. Place a Warped Nylium block, and a Twisting Vine on top of it.

4. Use the Bone Meal a few times on the Twisting Vine to grow it.

5. Use the Firework on the Warped Nylium block.

6. Listen for any climbing sounds.

Expected behavior

Fireworks would not make climbing sounds when flying upwards through Vines.

Actual behavior

Fireworks make climbing sounds when flying upwards through Vines.