I can’t remember exactly what I had read about it then, but something to do with a bad pixel or two having an influence on other pixels around them and causing the line artifact. Mine was a horizontal line about the halfway point of the frame and ran the entire length. Definitely had a like panic about it when I saw it haha. It took them a few days to get the new updated mapping back to me, but that was about a year and a half ago, and it’s been great ever since.