The bug
Sometimes in bamboo forests (might happen somewhere else, didn't check) podzol is generated below solid blocks instead of dirt.
How to reproduce
Seed: -2091432038368199440
Coordinates: /tp @s -1988.44 74.37 -2372.69 176.88 27.22
MC-137595
Podzol generates below other blocks
Resolved
Fixed
8
also happens with podzol in mega taiga biomes and the podzol that generates when you grow a 2x2 spruce tree