I can not understand why my shadow is not behaving like expected. Increasing the shadow camera frustom does not change anything of the behavior.
Best explained by examples:
I am simulating sun position, and it is definately related to the sun being low when it happens. However, I fail to see the reason and I am not aware of any known issues where light angle will cause this.
Thank you for taking a look and considering my question.
Following up on that this was entirely my mistake. I thought I had the shadow caemra big enough, and I did. It was in the end when I altered the positon of the light the shadow camera near came closer than the nearest obscura.