I spawned the Black Death by drinking Destabilized Redstone with a straw (Summons lightning and sets player on fire)
The game crashed consistently until a friend TP'ed me out of the area Before the chunk loaded.
This was client side and no other members on the server experienced crashes and were nowhere near the Crash Area

Client Log: Crash.txt

Mod List: https://www.curseforge.com/minecraft/modpacks/minecraft-eternal/files/2981794

I'll happily answer any questions to the best of my ability

unable to reproduce, I assume this was fixed at some point