Log spam & chunk render issues

[natrow]

Running on heavily modded server causes several issues. Visually, chunks only load in a large square as if only one region file works.

Common errors:
Ignoring chunk since it's not in the view range: -74, 119
java.lang.IllegalStateException: A biome was missing a key! The biome was [net.minecraft.world.biome.Biome@17d2553]

Partial log: (full log too long from all the spam)
https://pastebin.com/L0sSyftN