What the title says. The game sometimes crashes when opening Ice and Fire chests and when looking up some molten metals usages through JEI. Here is the log.

Thank you for report. I will investigate the issue.

What modpack version btw?

I cannot reproduce it. For me everything work fine.
Provide more information about modpack version please.

The version is 0.89. It mostly happens whenever I open loot chests found in cyclops coves.

Thanks for the report anyway.
Most likely, this issue will be fixed next release.

Can you test if this happens on v0.94.0 ?

I'm still using 0.89 and now it started working fine again for some reason, the item that crashed the game no longer does so.

I'm currently using GDLauncher and can't upgrade to 0.94, 0.89 is the last version available for me to play.

You can use "Import" feature

https://github.com/Krutoy242/Enigmatica2Expert-Extended/releases/download/v0.94.0/E2E-Extended-v0.94.0.zip

Can you upgrade to 1.0.0 right now and check if issue persist?

Since you not respond, probably issue resolved for you personally or becomes unrelated. I'm closing issue. Feel free to open new one if still actual.