Glow lichen can replace dripstone block and pointed dripstone when generating

Summary:
In the dripstone caves biome, glow lichen can replace dripstone block and pointed dripstone, which creates strange generations. Sometimes glow lichen can be generated entirely in blocks, which makes absolutely no sense.

Seed: 7159122465189192029
Coords: 4353 11 1632
Coords: 4376 -6 1603
Coords: 4559 39 1509
Coords: 4629 63 1541

Seed: -732078047
Coords: -1169 -15 226

Due to MCPE-146494 the generation may change and you may not find the "weird" generation.

Steps to reproduce:

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