I play on medium settings and get about 50fps on average - which is fine for my rig.
But randomly during cutscenes (which run fine at 60fps without fail) it will freeze for a second or two before carrying on, making cutscenes very choppy and “Stop/start.” This doesn’t happen all the time, but it happens enough for it to be annoying.
I get these freezes to occasionally / thinking my game is indefinitely frozen requiring a restart so my heart stops - only to carry on shortly after to notice a random Game Saved however this isn’t during cutscenes for me yet though.
Seems like mine is the opposite problem to you lol, mine only occurs during cutscenes, and each freeze is only a second or two, it just makes cutscenes very choppy.