This was my experience, but I only played very briefly. When I first downloaded the patch, I had an error where the launcher crashed and I had to restart the computer and game. I did that, and I also made sure all of my drivers were up to date. I have Windows 11 and NVidia as a graphics card. I also play with a bunch of mods, so I'm not sure if that affects it.
I also had to reset my NVidia settings with the framerate, like I used to always have to after a patch, to cap it around 60.
When I loaded a save, all the patch seemed to affect was the launcher issue not working with Windows 11. The save seemed to perform normally for the brief time I was in it, but like I said, I didn't play long.