For all of them I selected superflat then hit customize, then I used classic flat and only changed the biome from plains to the biomes listed in the images.
u mean the village centers? yeah all 3 had a center/well.
I noticed this bug as well and here are the world seed and coordinates I found it in:
Seed: 8254563267457374440
Coordinates (XYZ): -215, 68, -19
For all of them I selected superflat then hit customize, then I used classic flat and only changed the biome from plains to the biomes listed in the images.