I had never a problem with the vulkan graphic options, but after patch5 the game crashes after leaving the start screen in the cave and I had numbing lag after the first devils fight on the flying ship. With directx11 option all is fine. I tried a feedback but was not able to complete the formular- don´t know if the license agreement was the reqason- I coulnd´t mark the check box.
I have been experiencing crashes when running the game with Vulkan. With DirextX 11 on the other hand, I have constant freezes, that don't cause the game to crash, but to freeze for several seconds, quite often.