Any opening can cause this problem when it's center is closer to the end of the wall than the actual corner window. Some objects, like rooms and beams, can create an opening to help cut out some of the wall surfaces.
We have it logged, but it's currently pretty low on the priority list.
List of openings (what can cause this issue):
- Window
- Door
- Wall niche
- Bump out window (bow/bay/box window)
- Pier/pad
- Wall hatching
- Wall cutout (helper opening)