Latest, 0.4.13

Not really sure, had the minecraft window minimized and it just crashed. I do have optifine. Also, I can't open the JEI config despite having the FTB GUI library, and the JEI menu changed sizes when updating from 0.4.10 to 0.4.13

latest.log

This issue is no longer valid now as the previously "unstable" releases of FTB Mods have been released and incorporated into this pack ^^

Hmm, I think this is an Optifine issue, but try downgrading JEI to the last version if possible :)

Will do! I'll see if it's fixed, and I'll reply again if I crash for whatever mysterious reason

Part of it reported here: mezz/JustEnoughItems#2355

Game crashed again, although this time I was in the nether trying to mine ore and it crashed. Here's the log
crash-2021-05-18_19.43.59-client.txt

Are you using OptiForge in addition to OptiFine?

Oh, no. I'm not sure what optiforge is

Ah, that's probably the issue 😄 OptiForge is pretty much required to use OptiFine on Minecraft 1.15+ https://www.curseforge.com/minecraft/mc-mods/optiforge/files/3248738

Edit: Please let me know if that resolves the issue :)

Ah, thanks. The crashing wasn't very often or repeatable, but I'll let you know how it goes.

I just updated to 0.4.13 and anytime I try to go into the config of JEI it says to install FTB Library to access in game config.