Also reported at Waystones - TwelveIterationMods/Waystones#590

Minecraft Version
1.19.x

Mod Loader
Forge

Mod Loader Version
41.1.0

Mod Version
waystones-forge-1.19-11.1.0

Describe the Issue
Testing mods in a single player in Creative Mode. Found a waystone generated at a village. Clicked on waystone to activate it and the game crashed.

Logs
https://paste.ee/p/aMKyi

This was a race condition in Waystones unrelated to Rubidium.

So, closed