There is an issue that make replays at 60 FPS on PS4 Pro. My favorite issue It looks really really great !
What
there's a replay bug that gives you 60fps, steps were reported earlier on GTP (can't find the post now): Watch a replay, use the photomode then exit photomode and when you resume watching the replay it will be 60fps.
We may or may not fix this bug, Ian is still thinking about it