For some reason, after picking up the Mission Disasterpiece, I got a visual bug after a certain point in the Mission. Sadly I thought it would simply go away if I would play but it didn't. Now I'm left with this bug and I am unable to load any other saves and restarting the game hasn't worked either.
here is a video showing the Visual Bug and how it makes any further playing sadly not possible. Fiddeling with the graphics option hasn't helped either...

Permanent Visual Bug