I have a clipping plane that has disappeared from model space but is still active in my details. I cannot see it or select it, but when I enter a detail I can selected it using SelName. All the properties come up like normal in the sidebar but if I change back to model space it is not visible. Since I selected it in the detail it remains selected (but invisible) in model space. I can even enable the clipping plane to clip geometry in the different model space views.
I have confirmed the layer visibility is on, and that the clipping plane hasn’t been hidden.
Actually tried one more thing as I was writing this: By activating the layer that the clipping plane is on, it reappeared in modelspace….
The missing clipping plane is now acting like normal.
Seems like there could be a weird display pipeline bug that caused the clipping plane to disappear and not get re-rendered.