Glow lichen and sculk vein can generate floating inside trial chambers

Summary:
Glow lichen and sculk vein can generate floating in the air inside trial chamber. This generation happens in the trial chamber, and more noticeable with the structure generating in the deep dark biome.

Seed: -1447
Coords: -738 -38 140
Coords: -723 -21 155

Steps to Reproduce

1. Create a world with the specified seed.
2. Visit the specified coordinates.

Observed results:
Glow lichen and sculk vein can generate floating inside trial chambers.

Expected results:
Glow lichen and sculk vein should not generate floating in the air.

Image: