[Bug] Mineable cave entrances on Prometheus have lighting/graphical issue

I've only come across about 4 caves on Prometheus so far, but of the ones that had sealed off/mineable entrances, they have this lighting/graphical issue where it looks like just the mineable part is in complete shadow. As you can see in the picture I attached, when you hit the entrance, the hit appears as if it's lit up. The sun is also directly shining on it, so it doesn't make sense visually.

The back side of these walls also has a sort of graphical issue, where you can see what appear to be polygons, and it sort of flickers. Hard to describe with words, but I can only upload one image here.