Ok so I was in the part of the Harkon questline where you fill the pitcher thing with water from the five shrines; I entered the cave with the last one and I tried to use the VL form and instead kept the human form while still having VL motions, and I couldn't access any character menus to undo it. I was also stuck in first person view.

I reloaded a save and it worked fine except it was impossible to go to first person view after I had changed back to human form after being a VL.

Also the walls in the vampire castle tend to flicker in and out of existance, and the word wall in the lake didn't work after I killed the dragons and came back, and the new call dragon shout failed to work with all three words purchased.

I haven't tried uninstalling mods yet though.