Have been playing the game since before christmas without issue, but just last Thursday this issue flared up: when I start the game, my mouse starts lagging, hard, to the point of making navigation almost impossible, and a total excessive in frustration to try to actually play, which did happen a couple of times because the issue starts almost unnoticeable when just opening the game but gets progressively worse until it peaks after a couple minutes. Not just within the game but if I alt-tab to anything else too. I have noticed that while before it used to only accounted for 1.4GB use on my gpu, now it takes 1.9GB.
The issue stops after roughly 10 seconds after closing the game, but doing so also takes longer because when I manage to click on “exit to desktop” the screen goes black and, after a while, a message box tells me “The UE4-MCC Game has crashed”.
The worst part of the issue is that it happens randomly; the first time this happened was on Thursday morning, but at night I could play just fine, today, I found the issue again, but after much closing and opening the game with the issue it suddenly went away.