Dripstone generation replacing mineshaft floor

Put the summary of the bug you're having here

What I expected to happen was...:
Dripstone generation not breaking parts of mineshafts

What actually happened was...:
Floating Dripstone blocks that make up a part of the Mineshaft floor

Steps to Reproduce:
1. Load into a World (My seed: )
2. Find a Mineshaft within a Dripstone Cave
3. Look for places where the generation Broke
(Coordinates on Seed -5094042821232762650 are 98,13,28)