DO NOT REPORT AN ISSUE IF YOU HAVEN'T TESTED THE ISSUE WITH THE LATEST VERSION IN CURSEFORGE
I have tested the latest curseforge version and it still crashes.

Functional Storage Version:
functionalstorage-1.21.1-1.4.2

Titanium Version:
titanium-1.21-4.0.36

Crashlog If Applicable (Upload to pastebin/gist):
https://pastebin.com/wMLzY2WB

Not sure what I did, I can't load up my world to check the issue with any drawers.