I have the impression that the game has a bug that hamstrings performance. Sometimes simply not doing anything would have the game slow to a stop. Using the Windows task manager is the only way to shut down the
game.
My computer should have sufficient power to run most games, and this bug happens within minutes, especially after going into chapter 3. I don't think it happened with v2.5.5.
It should be noted that the game won't let me CTRL-skip dialogue that I have previously encountered, even if that text was several saves ago on the same file.
Ryzen 3600, 64-gigs of RAM.