Reflections have strange lines in them

Hi everyone I've been having this issue for 3-4 versions of Unity now. What happens is I bake a large scene and my reflection probes all end up with black lines in them. I try rebaking with better settings or worse settings and they stay there. This issue happens with the default environment reflections int the lighting tab or if I set up reflection probes around the scene. I don't know what causes this or how to fix it.