I'm currently having major fps problems with certain interiors, example all of the Windhelm ints (the worst offenders), Bee and Barb, and a few others. I have not had issues like this before. Drops are strange however, i.e. My framerate is at my 75 fps cap upon the cell loading but it slowly drops to about 5-7 frames just a couple seconds after the scene fades into view. My cpu pegs at 99% on all cores and gpu usage drops to the low 10s. Ram usage stays the same. I've tested my hardware with no issues, also tested other games in my library with no similar drops. I don't have any mods that affect lighting other than NAT and the problem persists even when both NAT and my ENB are disabled. My install is vanilla apart from NAT, CBBE, and few weapon and armor mods. However, loading up a save (including quicksaving and quickloading) from within the affected cell removes "fixes" the issue, but exiting and re-entering the cell cause the low fps again. I have a feeling it might be some issue with the game storing the previous cell loaded after entering a new cell. EDIT - After testing with some other locations, I decided to test if entering an interior like Candlehearth Hall with the coc command would give me the fps drop. Using Coc to enter a cell (such as Candlehearth) does not cause the fps drop, however using Coc to enter a Windhelm interior WHILE being in Windhelm still causes the fps drop. Anyone have an idea of what's causing this? My specs for more info: Ryzen 1500X Gtx 1070ti 16gb RAM 500gb SSD (where the game is installed) Thank you in advance.