Openmw Fps loss over time (138 to 90 in ebonheart)

Hello, im just gonna leave it here incase someone has the same problem as me

It happens after 1 to 3 hours of gameplay, I have only purist patch and optimization patch installed, besides i play in 4k and have maxed out all there is to max out in the launcher and game settings.

Basically fps loss over time in certain spots, same weather and i think same amount of npcs, it isnt bothersome but i wonder why that happens

I have a 4090 and i9 14900k, i swear if its that damned cpu i will never buy from intel lol

i know for a fact i have the issue because when im in one spot looking at one direction i have lets say 89 to 91 fps, after i restart the game it gets to 138 fps

i would be very grateful for any help

also 0.48 version of openwm

also other modern games run perfectly fine so i dont think its a hardware issue (on the gpu side atleast)