COMPLETELY Disappearing Clipping Mask
Hey all, i'm having a problem. So I have a large amount of linework for an architectural project, and a lot of it extends off it's own artboard, so I used a clipping mask the size of the artboard to fix that issue. I then moved onto a different artboard, but when I returned to that artboard, EVERYTHING had disappeared, clipping mask, linework, etc, the entire artboard was blank. At first, I thought I had accidentally deleted it all, but when I pressed ctrl+y to just see paths, everything shows up. The problem is that when I get out of the path view, it's still all gone. I can't select it, it doesn't appear, and it's not locked or on a different layer. What on earth is this problem, and how can I fix it?

to display the GPU Performance settings in the Preferences panel.