The mouse left click release event is not called when a context menu has been closed

// mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);    setContextMenuPolicy(Qt::CustomContextMenu);    connect(this, SIGNAL(customContextMenuRequested(const QPoint &)),
            this, SLOT(slotShowContextMenu(const QPoint &)));
}

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

void MainWindow::mousePressEvent(QMouseEvent *event)
{
    qDebug() << "Mouse button pressed" << event->button();
}

void MainWindow::mouseReleaseEvent(QMouseEvent *event)
{
    qDebug() << "Mouse button released" << event->button(); // => not called if a context menu has been closed before
}

void MainWindow::slotShowContextMenu(const QPoint &pos)
{
    qDebug() << "Show context menu : " << pos;    QPoint posMenu = pos; // non-const QPoint
    QMenu contextMenu(tr("Context menu"), this);    QAction *action1 = contextMenu.addAction("Action1");
    QAction *action2 = contextMenu.addAction("Action2");    connect(action1, SIGNAL(triggered()),
            this, SLOT(slotItemMenu1Clicked()));
    connect(action2, SIGNAL(triggered()),
            this, SLOT(slotItemMenu2Clicked()));    connect(&contextMenu, SIGNAL(aboutToHide()),
            this, SLOT(slotContextMenuClosed()));    contextMenu.exec(mapToGlobal(posMenu));
}

void MainWindow::slotItemMenu1Clicked()
{
    qDebug() << "Menu action 1 triggered";
}

void MainWindow::slotItemMenu2Clicked()
{
    qDebug() << "Menu action 2 triggered";

}

void MainWindow::slotContextMenuClosed()
{
    qDebug() << "Close context menu";
}



// mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QDebug>
#include <QMouseEvent>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

public slots:
    void slotShowContextMenu(const QPoint &pos);
    void slotItemMenu1Clicked();
    void slotItemMenu2Clicked();
    void slotContextMenuClosed(void);

protected :
    void mousePressEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H