I have the same issue, just walking randomly around the harbor. Insane fps drops, load older save, everything fine. Do you have Nvidia card? Btw does confirmed mean Larian confirmed this?
Yes I have an GTX 760, that's one of the parts I also got for the insane amount of FPS drops. It also not might be triggered with Evelyn's house, it's a memory leak somewhere on the game or when you continue to do quests and so forth the stability issue kicks in. I have no problems again when playing the older save but will still continue to play some today and see if it happens again.
Though what I realize is when playing the game longer, in allot of areas the FPS will go down between 30-40 FPS, so I saved the game and quit, and go back to that saved file I just created my FPS stays at steady 60 FPS again. I think they really need to start some optimization on the next build.
Also give them a report too from Raze post. Oh confirmed means that I have tested this stability issue thoroughly, though I will remove the title as I really don't know when this issue is triggered.
