Wondering what these Light Artifacts are.

Hello, I was wondering what these artifacts showing here are. They don’t seem to show up in the actual editor, they just show up in either the asset viewer (when you click on the mesh in the details panel) or the material editor. I know, I’m using the preview, but these lines showed up for as long as I can remember in earlier versions, I just want to know why they are there.

Lighting and shadow quality of those preview windows is very low, so it’s normal to see such cascade artifacts at certain angles.

Ok. Thanks!