Flying kelp and sea grass can be generated above the amethyst geode entrances

Summary:
Flying kelp and sea grass can be generated above the amethyst geode entrances.

Seed: -732078047
Coords: -13608 37 -2040

Steps to reproduce:

1. Create a world with the specified seed.
2. Teleport to the specified coordinates.
3. Consider how the sea grass and kelp was generated.

Observed results:
Flying kelp and sea grass are generated above the geode entrances.

Expected results:
Flying kelp and sea grass should not be generated in the world.

Image: