Problem with FilmGrain 2

I have encountered an issue with FilmGrain 2 when playing Red Dead Redemption 2 and Horizon Zero Dawn, after like an hour or so of playing the grain will stop floating around and just stays there, still. Weird thing is that i have noticed it only after upgrading my 980 to a 2080, i doubt that has anything to do with the problem though. I really like this shader, been using it for years and this issue really bummed me out lol, please if anyone knows what is going on, help me