Wood pillars from mineshafts are generating on pointed dripstones

The bug

The log pillars which are supporting the mineshafts since 21w06a are generating above stalagmites. This looks really akward and the log pillars should replace the pointed dripstones.

How to reproduce

Use the Single Biome world generator with the Dripstone Caves biome.
This may take multiple tries to reproduce (see MC-240271).

Seed: -7755709095100293132
Coordinates: /execute in minecraft:overworld run tp @s 11274 -6 -417 -393 32