I am no expert but I think this game has severe memory leaks and act 3 in particular seems to be really poorly optimized regardless of platform, I really hope to see all this fixed at some point
I don't think it's a memory leak, if it was a lot of things would break completely and wouldn't function period to my experience. Honestly, what it feels like is someone did the testing on a Dev kit Console and not a factory one, or a rig that was beefed up that it hid the problems you'd find on common retailer stuff. It might be the way the game handles your processing cores and threads, which would explain why it suddenly just bottlenecks then goes again. At this point, they should heavily just consider a rollback for a brief moment until it can be fixed, cause as of right now...if you got a new save, you physically can't play it at all.
