Issue Description:

My 1.11.2 mod pack (Sky Arsenal) won't load the world after adding the "Chickens" mod.
No crash, just stuck for over 45 minutes.
The pack memory usage shot up to over 12GB.

Happens with old and newly created worlds.

(After removing the mod, the pack is working fine.)

Steps to reproduce (important):

There's a lot of mods in this pack (about 200), so perhaps it's an inter-mod thing.
The list of mods can be found here: Link to Sky Arsenal page

Just added the mod to pack at current settings.

What happens:

Game stuck on "Building terrain".

What you expected to happen:

World to load.

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Affected Versions (Do not use "latest"):

• Chickens: chickens-5.0.1
• Minecraft: 1.11.2
• Forge: 13.20.0.2530

Please close the issue, after more investigation, it was the interaction with the hatchery mod, game starts after removing it.

Will open issue in the correct place, Thank you.