[Experimental] Fossils can generate flying in caves

Summary:

Fossils can fly in new caves. This bug has been fixed in the Java version MC-214784.

Seed: 63654350
Coordinates: -4920 32 -16832

Steps to reproduce:

1. Create a world with the specified seed.
2. Teleport to the specified coordinates.
3. Consider how the fossils were generated.

Observed results:

Fossils are not attached to the cave in any way and are completely floating in the air.

Expected results:

Fossils should not fly in caves.

Image: