This only happens with the Irixium theme window decorations that I’ve been using for months without issue. It just started, went away for a while, and came back. The line is the color of the window decorations. In the attached picture the window is not active so it’s gray, but it would be beige if it were active. Changing window decorations makes it go away, and I’ve looked at the aurorae files and see no obvious problem. As I said, this just started happening after using the theme for months (and it wasn’t from an update in the theme).
