Install these mods

Load Seed: 4312595124482500659 > TP to 150 120 -4013 > Chunks stop loading
I believe its NetherExp causing an issue with Removing behaviors from Alexs Mobs
[email protected]/com.github.alexthe666.alexsmobs.world.FeatureLeafcutterAnthill.m_142674_(FeatureLeafcutterAnthill.java:70)

Chunks stop loading

Here is a log from my BMC4 testing where it just infinite saving and quitting and doesnt show proper logs for the issue
2024-12-11-3.log
Started happening with version 2.1.1

Fixed in 2.1.4