I've recently started having a problem where some objects that I edit or insert, such as blocks, only show in white. The photo I show is an example. I recently used viewport clip in order to add in the detail shown on the top right, and when I did so, the viewport went white, and it has since not changed. It is supposed to show in yellow, as shown with the other viewports. When I change to "bylayer" it is white, and when I manually change it, it stays white. As shown, I've changed it manually to cyan, and it remains white.
I think this may be an obsucre system variable problem, but I'm not sure where to start.