When I was scrolling through the recipes, it crashed. The crash report stated something about rendering Mob Util XP Bucket.

https://pastebin.com/XqzLcyjZ

what version of mgu? the crash log is cut off at the end and is missing the mod list.

The latest version of MGU. 0.4.46

and what version of jei? because i haven't been able to reproduce this, has it happened more then once for you? or was it a one off crash.

I just updated jei to the latest version. I'll see if it's fixed.

What I did was to scroll up in the jei menu until I crashed.

https://pastebin.com/81JTQ46s

Seems to be a pproblem with another mod. I suspect it's Rubidium, or Configured, as I see them a lot in the crash report. I'll check.

You're not gonna like what I say but after attempting, it's not a problem with any of those mods. I now have 0 inkling on as to what the problem is.