I was updating all my mods to 1.21.6 and had a texture glitch in my inventory, its a persistent glitch, causing weird shading and lighting issues with items in my inventory as well as anything relating to GUI. Below is a screenshot from in game. This isn't that big of a deal but its kind of annoying, and I've found that this mod really helps with performance so hopefully this is fixable. Thanks for your time.

Duplicate of #378
You can find the fix there as well