QSystemTrayIcon does not emit the QSystemTrayIcon::activated signal on Ubuntu 20.04/22.04 for left click and right click

There is a simple project created in Qt Creator (File - New Project - Application (Qt) - Qt Widgets Application). Added class members:

private slots:
void trayIconActivated(QSystemTrayIcon::ActivationReason reason);

private:
QSystemTrayIcon* trayIcon_{};

Also, an image has been added to the resources to display the icon.

Here is the content of mainwindow.cpp:

#include "mainwindow.h"
#include "./ui_mainwindow.h"

#include <QDebug>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QIcon icon;
    icon.addFile(":/banana.png");
    trayIcon_ = new QSystemTrayIcon(icon, this);
    connect(trayIcon_, &QSystemTrayIcon::activated, this, &MainWindow::trayIconActivated);

    auto menu = new QMenu();
    menu->addAction("Action 0");
    menu->addAction("Action 1");
    menu->addAction("Action 2");
    menu->addAction("Action 3");

    trayIcon_->setContextMenu(menu);

    trayIcon_->show();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::trayIconActivated(QSystemTrayIcon::ActivationReason reason)
{
    qDebug() << "trayIconActivated()" << reason;
}

The MainWindow::trayIconActivated() slot is ONLY called for the middle mouse button click. 

This bug reproduces in Ubuntu 20.04/22.04 on Xorg and Wayland graphics servers.

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On Windows 11, QSystemTrayIcon::activated signals are generated for all mouse buttons.

On Kubuntu 22.04 (Xorg graphics server), QSystemTrayIcon::activated signals are generated for the left, right, and middle mouse buttons (but not for left double-clicking).

On Linux mint 20/21 Cinnamon (Xorg graphics server) QSystemTrayIcon::activated signals are generated for the left and middle mouse buttons (but not for left double click and right click).