Versions
Minecraft Version: 1.18.1
Minecraft Forge Version: 39.1.2
Mod Version: 2.0.1

Describe the bug
Parallel pre generation does not work correct for big worlds.
After the pre generation is shown as done, it is not done and the world is only generated in parts.

https://www.curseforge.com/minecraft/mc-mods/world-pre-generator?comment=201

Expected behaviour
The parallel pre generation should be done, if it is shown as done.