A Mansion in the Seed i tested had a side where there was the wall missing. (It also generated on a lava pool so you might want to turn fire tick off brfore you go there)
Seed: 2513444653087665206
MC-107480
Mansion missing a wall
Resolved
Duplicate
0
Jan Ziegler
(Unassigned)
Unconfirmed
Minecraft 16w39a
Retrieved
Duplicate of MC-96998