Version Info

• Minecraft, 1.20.1
• Fusion, 1.2.11+a
• Forge - 47.4.6
• No optifine

Steps to Reproduce
After some time, a player crashes

Crash report (~/logs/latest.log)
latest.log

I don't see what this crash has to do with Fusion or Palladium.
All it shows is code from Embeddium and something to do with a multipart model.

I can try to look into it, someone I was playing with had this crash while I have not. We had create setup with some basic immersive multiblocks, not enough crashes suspected the two mods when it happened.

Also palladium refers to this palladium.

Also palladium refers to this palladium.

Ah that would make more sense. I was looking at a different mod with the same name.

The crash occurs when getting a value from the selector cache map in a multipart model. Palladium replaces the default map type with the one that produces the crash in their MultipartBakedModelMixin.
I would suggest reporting the issue to them as I think they are most likely to know what is going on.

Anyways, it seems unrelated to Fusion, so I will close the issue.