I am running on a xfx 7800xt currently. I deal with this problem for over 2 years. In every Unreal Engine game I am getting a nonstop moving and seperated character. It happens in every character, doesnt seem to be a thing on enviroment and stuff. I was looking for a fix in 2023 and I read somwhere that UE is doin bad with a high number of cores. So by setting Cpu affinity, disabling some cores, it works perfectly. But now I am trying to play fortnite, and it looks like the anticheat engine denying to change the affinity. As I cannot deal with the anticheat at all, I reached here to find a solution, permanently. I am on am4, so if I really need to go to another cpu, it will be a costly cpu/mobo/ram combo and I dont really want to now…