Volumetric lighting with fog not rendering correctly for interior scene.

Hi there, I have been trying for 3 days trying to sort out this issue. I have tried numerous versions of UE4, different computers and different projects which are all producing the same result.

I have an interior scene with a window which should allow shafts of light to come through after enabling the volumetric fog in the heightfog as well as with the light itself (A spot light). I’m confused as to what i am doing so wrong to get this kind of result. I started a new scene and made a room out of cubes just to see if the same thing happened, which it does.