Nor sure if it's Architecture's fault or BiomeMakeover

https://gist.github.com/dr3ams/9c1a107146c601098a11e32a80f716e4

Happens randomly, client usually works after relaunch.

Looks similar to #300.
I'll look into it on my end.

This should be an issue with Biome Makeover, has this occurred to you since @dr3ams?

Wasn't reported since then and we had BiomeMakeover updated. (it's in a modpack and was reported by a player)

Awesome, I‘m gonna be closing this then for the time being to clean up the issue tracker a little. Feel free to reopen if it happens again ^^