Played finished the entire GOW campaign in multiplayer co-op with a friend from casual to insane. Noticed that when I loaded up hardcore and insane, once in a while I would get a black/blank screen for a split second, doesn't happen often, got me worried when it happened >.< and at times it stutters but I guess this can be attributed to loading a new scene (hence sometimes can see blurry textures) but not sure what causes the black screen pauses.

My friend didn't run into the black/blank screen issue but it had the tendency to hang his console every now and then, this was when playing either GOW or R6: Vegas.