Description from EVGENSYPERPRO

Blocks may not be generated randomly in the mansion. Not one particular mansion is affected.. 

Examples:

Seed: -2111305578 (examples use 2 mansions)

On coordinates /tp -12193 89 -9582 removed 2 blocks in the wall

On coordinates /tp 28438 88 -14713 and /tp 28455 88 -14697 also a passage in the wall

On coordinates /tp 28490 87 -14707 and /tp 28451 87 -14739 and /tp -12157 85 -9604 removed inverted stairs (decoration)

Steps to reproduce:

1. Create a world with the specified seed (-2111305578).
2. Visit the above red coordinates.

Observed results:
The mansion is not entirely complete. The mansion has randomly not generated blocks.

Expected results:
The mansion should be intact.

Image:

Original Description
World seed: -2111305578
Tp to "-12120 ~ -9591"