When opening a file that was saved with multiple clipped views, the edges of the clipped sections do not show in all these views.
Basically doing anything (e.g. hiding objects, calling a new NamedView) will make the edges render as they should:
YT issue with demo file created: RH-40433
These images are with the factory-default shaded display mode (or at least as far as I can tell - nothing shows up blue in the settings) and I find that - when they render - the 3px clipped edges are partially being drowned by the 2px surface edges. I’m not convinced that it’s correct to render surface edges here.
In my custom display mode, I have color reduction for surface edges set to 100% and with black clipping planes, there is no drowning…