Everytime a user clicks on a separator in a context menu the context menu gets closed. That's a problematic behavior that can lead to usability issues, as detailed on the link below. I found this behavior on both Windows and Linux programs written using QT.

This bug was first reported on KDE Bugzilla and examples of usability problems can be found there. KDE developers agreed that's a valid issue.

If any more details are needed I can try to provide them.

Thanks!