Lag everywhere

[Xikto]

been about 3 weeks that i noticed this, sometimes everything that needs key input to work like moving left and right and parkouring gets delayed making movement impossibly hard, this does not happen duo to bad interenet connection either as this happens everywhere including orbiter and no matter solo or otherwise for example just earlier today was playing rj for hours and it was fine but then someone invited me and i joined and boom lag and when it comes, it doens't go away easily i restarted the game and it's ok now. Sometimes nothing else goes wrong at the same time but some times i get horenndess fps drops at the same time.

and i assumed this is my systems problem but i havn't changed anything about my setup so it can't be that and otherwise the system is just as it was.