The pointed dripstone clusters tend to generate too much frequently with thickness "tip" (smallest) on really big caves. This doesn't happen on ceiling clusters or inside small caves. This was fixed on Java 1.18 pre-release (
How to Reproduce
1. Find a dripstone cave
2. Explore around.
3. Compare the seed and coordinates with Java ones.
Clusters of stalagmites only generate with the "tips" on most of the floor of big/tall caves.
Stalagmites generate with size variation, like how pointed dripstones generate on the ceiling or inside small caves.