Latest snapshot (first 1.17 snapshot) causes some of the warped/crimson forests not to have stems/trees

The summary explains it pretty well, but the warped and crimson stems aren't generating in their respective biomes sometimes. seems to only effect the newly generated chunks of the nether. please fix this, as it makes the nether seem empty wand plain. Nylium still generates, as well and the vines, but no trees.

Also, I just noticed that the basalt deltas are affected aswell. the terrain generation is very flat, nothing like the spiky pillar-like formations that are supposed to be there