It does not make a mistake, it is that the game is going to pull, it gets caught for seconds and seconds and so during several processes that the cpu or the gpu has to work harder, (for example in the cs go when an enemy appears in front of me and shot, when I win the match and get caught for a second or so, or when I start shooting in the cs go).
In fortnite I have also noticed several pulls, it gets caught, frozen, for random seconds.
I do not know if it is errors or problems of the games of those games