Woodland mansions will still generate in roofed forest mountains, even though other biome-specific structures won't generate in "mutated" biomes. To reproduce, use the seed 8 on the dark forest hills buffet world type, and go to 3072 82 2835.
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gaspoweredpick
[Mod] Neko
seed 0
Seed 0 actually generates a random seed (MC-44944). Can you check the seed in game using /seed?
gaspoweredpick
Okay I fixed it. I changed the seed to 8 (and even used the seed command to check and it was 8). This should be easy to reproduce now.
Duplicate of MC-107422.
This is unrelated to the biome. It will have the same issue if it generates inside mountains or other biomes.
gaspoweredpick
No, the issue is that they generate in mutated biomes, unlike every other biome-specific structure.
anthony cicinelli
This is fixed in 21w40a
gaspoweredpick
Relates to MC-128686