The bug
Grass / flowers / snow / trees are placed incorrectly in Buffet World generator.
How to reproduce
World Type: Buffet
World generator: Surface or Floating Islands
Select the Flower Forest, Mushroom Fields and Bamboo Jungle biomeWorld Type: Buffet
World generator: Caves
Select the Flower Forest biome
Seed: 2069169955934671865
X/Y/Z: -1466 41 6797
Facing: 70 41
Must depend on the biome because I didn't have any trouble with those when I did taiga biome, only stuff that was misplaced for me were some mineshafts, and villages, and the piliger building, because some would spawn under the floating islands over the void. I think when the generation changes to floating islands that the structure spawn area changes in it's Y coordinate, maybe make it dependent on spawning on blocks in general. Reason I say that is because not all villages were misplaced just some, but it could also be fun for a survival map cuz they might risk the drop into the void in order to loot them.