QSystemTrayIcon::messageClicked not triggered when clicking on the popup message in KDE Plasma

QSystemTrayIcon::showMessage(title, message, messageIcon);

connect(this, &QSystemTrayIcon::messageClicked, this, &TrayIcon::openContentUrl);

private slots:
   void openContentUrl();

void TrayIcon::openContentUrl() 
{ 
    if(!mToastContentUrl.isEmpty() && !mToastContentUrl.isNull()) { 
        QDesktopServices::openUrl(mToastContentUrl); 
    } 
}