Black screen in arena and when I leave dala sewers

sometimes when I leave the dala sewers or even when I enter an arena I get blackscreens. Everything works perfectly fine except that my screen turns completely black and I cannot see anything except my mouse. moving my camera sometimes makes the image come back for a few frames. when I move far enough away the issue is usually gone. This seems to only happen on this pc (which is win10 btw). on my other pc (win 7) I have a very similar issue, but there only my ui disappears and it looks like if I pushed alt-z , but that happens about anywhere, not only in dala/arenas. any solutions or people with similar issues?