Villages float near blended chunks and generate wrong village variant

Water can generate weirdly in new cave biomes

Swamp floors (sand patches) do not blend properly in chunks generated in 1.13 or earlier

Biome Blending does not work with snowy 1.6 taiga biomes.

World upgraded from 21w43a does not generate new caves under old chunks

Abandoned mineshafts do not generate with chest minecarts

Hopper minecarts on powered rails will stop randomly.