I was in the nether, while looking in a certain direction the game crashes. When I loaded the save back up the last few minutes hadn't been saved. So i went to redo what was lost and it crashed again. So I loaded up, left the nether, saved, deleted the nether thinking maybe it was a corrupted block or chunk, did it again. Here's two crash reports.

https://pastebin.com/raw/QCsT1WjB
https://pastebin.com/raw/PSyGzJHG

This is ATM6 modpack, I also let them know but figured you'd want to know too.

It's not just a specific chunk or block. I loaded up the save and flew many blocks in the opposite direction and it crashed again. The logs look pretty much identical.

Can you please update IE and see if that resolves the issue?

I think i encountered the same problem
https://pastebin.com/62x3cYPW

Closing this, the issue should be resolved.