SUMMARY All menus throughout Plasma (except those in QtQuick apps) close even when clicking on item separators and other non-item areas (e.g. headers and margins of row-spread buttons). This behavior can be frustrating for users with lower precision pointing devices and may give the impression that an action has been triggered, even when it hasn’t. STEPS TO REPRODUCE 1. Right click e.g. on the desktop 2. Attempt to click a menu separator OBSERVED RESULT The menu closes just as though as an actionable item was clicked, which it is not. EXPECTED RESULT The menu stays open so the user gets a better chance at selecting a valid item without having to reopen the menu. SOFTWARE/OS VERSIONS KDE Plasma Version: 6.4.4 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.1
This is a QMenu behavior; I'm afraid you'll have to take it up with the Qt folks.