
I tested a bit after screenshot. I have 6x different Gem Dust in the bag. Doesn't matter which stack I remove, but when I do remove one of the 6x, or even one dust from the entire stack, the weight drops back to normal.
Same results after restarting game a few times.
In terms of Overrides and files, i've got Portrait Pack and Arelith Overrides from Steam Workshop. Nothing else. (bar auto-downloader NWNSync Haks).