Sadly because of the spam it makes in the logs, i can't upload it to pastebin.
latest.log

Steps to recreate:

1. Launch Minecraft
2. Get in a world
3. Find nuclear wasteland with a feral ghoul

https://www.youtube.com/watch?v=SMXHNjDnj-Q

@vesko128 I may have managed to fix this - it's a bug which appears in many different flavours, depending on the mods installed along NCO, and has reported by a few others. Here is a test build if you would like to try :)

That seems to have fixed the problem, thank you. Could I use this in my modpack for CurseForge or should I wait for you to update NCO before I upload the modpack?

Thanks for testing! I would recommend waiting, as otherwise something might go wrong when you update the pack again (launchers might accidentally lose track of the manually added build). I hope to get a new build out soon, though - just a few more bugs to sort out :)

Thank you for your support and incredible work, keep it up! :) I'm going to wait before updating my modpack I'm in no rush. Once again thank you very much.

No worries :)

Fixed in the build that should hopefully go up on CF tonight :)