Woodland Mansion and other structures gets smeared

Observed Result:
The Woodland Mansion gets cut off.

Expected Result:
The Woodland Mansion shouldn't be cut off.

Steps to Reproduce:
1. Create a new world using "robot" seed
in Minecraft 1.17

2. Generate chunks by teleporting to
this position "2889, 64, 1674"

3. Download and open Amulet

4. Teleport to "2889, 300, 1674" in Amulet and
select the chunk, after that click "Delete Chunks"

5. Update Minecraft to 1.18