Minecraft v1.15.2
Forge v31.2.36
Wall-Jump v1.3.5
Lord of the Rings v1.7.1-snapshot_1.7

Occasionally while loading a world or by traveling through a portal, in this case the Lotr portal, I will get a crash while loading the terrain. I'm on a server when this happens, but crash client-side.
Crash Report

Me too

Seconded. This is still happening, and is rather annoying.