[kde] [Bug 394837] New: KDE menu (start button) refuses to show any menu

[John Andersen]

https://bugs.kde.org/show_bug.cgi?id=394837

            Bug ID: 394837
           Summary: KDE menu (start button) refuses to show any menu
           Product: kde
           Version: unspecified
          Platform: Manjaro
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: jsamyth at gmail.com
  Target Milestone: ---

The KDE "start button", (K Button) usually found at the Left of the Panel, can
cease to function (will not pop up the menu) if you: 
1) accidentally drag some arbitrary distance while clicking the menu button, or 
2) switch desktops with the menu open.

Occurs with the menu alternatives: Application Menu, Application Launcher 

How to reproduce: (easiest way)
Select either App-menu or App-launcher menu alternative.
Click K button (start button) menu appears
Switch desktop via pager (while menu still showing)
Click K button again, and menu will no longer show, but K button becomes
underlined briefly

How to restore Menu functionality:
Any of these methods will restore Menu functionality to the K button
1) Right click the K-button and choose a different Menu Alternative.
2) killall plasmashell && plasmashell  (in krunner or a shell)
3) Logout.

Found using Manjaro Stable packages
KDE Plasma Version 5.12.5
KDE Frameworks Version 5.46.0
QT Version 5.10.1
Kernel 4.14.44-1 (Manjaro) x86-64.

Can not reproduce with OpenSuse Leap 15
KDE Plasma Version 5.12.5
KDE Frameworks Version 5.45.0  <------<<< ?
QT Version 5.9.4
Kernel 4.12.14-4 (Opensus Leap 15) x86-64.

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