Another workaround is to use the alternative shortcut without Super: Ctrl+Alt+L
Probably the shortcuts with Super should cancel showing of the Launcher when the other key of the shortcut (like L in Super+L) is pressed.
Another workaround is to use the alternative shortcut without Super: Ctrl+Alt+L
Probably the shortcuts with Super should cancel showing of the Launcher when the other key of the shortcut (like L in Super+L) is pressed.