The bug
The plains village house structures have tall grass around them saved to the structure, because they are always assumed to be completely in plains. However, sometimes, the structure spawns on the border of another biome that has surface blocks that tall grass can't grow on.
Due to MC-140452, it might also possible for the aforementioned tall grass to spawn in the air.
How to reproduce
Seed: 4983639407239914443
Coordinates: /execute in minecraft:overworld run tp @s -481.22 77.00 -272.66 -43.50 23.55
Linked issues
Attachments
Comments

Confirmed for 19w14b
Is this still an issue in 19w11b?