Invisible Items are still visible

I opened a Vertex property sheet and checkmarked "Invisible". The problem is, that the Vertex is rendered the same way like before, nothing changed. Is this a programming bug?

Only one checkmark can cause a behaviour like this. In the Options Window/Items Tab (Shortcut: F9) please change (LMB click) the column "Inv." (for invisible items) in the row "Vertices" from "Yes" to "No". This will cause all Vertices which are set invisible not to be rendered.

Applies to: