No appearing Interface + no keyinputs working

Can you try restarting your machine with a Clean Boot and see if the issue manifests again?

I've seen reports of it "randomly" happening too, but if it's consistently happening for you it'll be interesting to find the cause. 

it happens every time, reboot doesn'T fix it. but i'll try a clean boot, will update here

Still trying the Clean Boot thing... but i just see i described the problem wrongly ( i tested it once more and had it wringly inside my head ^^)

Problems is:

Not Interface

with wasd i move my camera, i can move my mouse, but i don't move the camera with the mouse.

Cutscene's are laggy and the audio is broken. At some points the cutscenes go smoothly and great - aaand then they break again.

The Audio: sometimes they speak - and no audio is appearing - or vice versa.

As soon as i'm in the game, my char gets frozen - same goes for cassandra. And when i want to move around with wasd - i just move the camera.

Still a clean-boot-issue?