Well, I tried everything, even resetting the INIs to the default ones and I still have the same issue so it doesn't have anything to do with BethINI, now to figure out what is causing it.
EDIT: Ah! I figured it out, it was all my fault, I was using "Boston FPS Fix - aka BostonDT PreVis-PreCombine" and "Previs Repair Pack" together (forgot to disable the former).