After more than ten years, Revit got me on my knees!
Attached you’ll find a door family, containing some nested families, that refuses to show up correctly in a project’s plan view. Instead of being cut, it is shown from above. I am aware that Revit tends to use the cut plane height in the originating door family but in this case I don’t think that's causing the trouble. Switching the category from “door” to “generic model” will do the trick - the grayed out visibility setting of the nested families “Show when cut in Plan/RCP” then switches from unchecked to checked - but leaves me with a wrong category.
Can anybody help me!