Having really odd memory issues with shaders enabled

I'm having a really bizarre issue with iris, and I've been trying to find the cause of this issue for a week.

When I have iris disabled, my RAM usage sits around ~13 GB, even when in creative and generating new chunks. However, if I enable shaders, after a few minutes my RAM usage continually rises until I disable shaders. I've found some github issues that are similar to what I am experiencing:
https://github.com/IrisShaders/Iris/issues/1862
https://github.com/IrisShaders/Iris/issues/1862

My GPU temps are ~50C, it's not an overheat issue. VRAM hovers around 80%, so it's not my GPU running out of VRAM.

This issue does not occur if I have iris disabled, it only happens when I have shaders enabled. I've tried using different shaders, that did not help. Completely out of ideas here.

Technical info:
MC version - 1.19.2 (cannot upgrade, most mods in the ecosystem are still on 1.19.2)
Iris version - 1.4.5
Sodium version - 0.4.4
Loader - Fabric
GPU : Nvidia RTX 2060
GitHub
What happened? After a period of playing with shaders, my fps starts to drop constantly creating instability, becoming unplayable, restarting seems to "solve" the problem temporarily, but...
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