I just had the clipping plane actively working in my Perspective viewport with Interactive renderer. Such a great way to work. But after I did a quick actual render (non Progressive), and went back to using the interactive window, the plane no longer will show the clipping in the viewport. I’ve tried redrawing the plane and some other things.
Edit: It works again now. Guess it’s a Bug (@pascal ?)
If the same issue occurs ever again, please send your project at support@chaosgroup.com for investigation.
Based on your description it does sound like a bug, but we were not able to reproduce it so far.
I am having the same issue. As soon as I turn off interactive render the clipping plane disappears and actually clips horizontally rather than vertically, as it is supposed to be.