Key release event lost

class MainWindow: public QMainWindow
{
  Q_PROPERTY(bool isCtrlPressed READ isCtrlPressed WRITE setIsCtrlPressed NOTIFY
                 isCtrlPressedChanged)
public: 
MainWindow() {
    connect(this, &MainWindow::isCtrlPressedChanged, this, [this] {
      ui->label->setText(m_isCtrlPressed ? "PRESSED" : "NOT PRESSED");
    });
    ui->label->setText("NOT PRESSED");
}

protected:
  void keyPressEvent(QKeyEvent *event) override {
    if (event->key() == Qt::Key_Control) {
      setIsCtrlPressed(true);
    }
    QMainWindow::keyPressEvent(event);
  }
  void keyReleaseEvent(QKeyEvent *event) override {
    if (event->key() == Qt::Key_Control) {
      setIsCtrlPressed(false);
    }
    QMainWindow::keyReleaseEvent(event);
  }

  bool isCtrlPressed() const { return m_isCtrlPressed; }

  void setIsCtrlPressed(bool aIsPressed) {
    if (m_isCtrlPressed != aIsPressed) {
      m_isCtrlPressed = aIsPressed;
      emit isCtrlPressedChanged();
    }
  }
signals:
  void isCtrlPressedChanged();
private: 
  bool m_isCtrlPressed{false};

QAction *openAction = new QAction;
openAction->setShortcut(QKeySequence("Ctrl+O"));
connect(openAction, &QAction::triggered, this, &MainWindow::onFileDialogRequested);
addAction(openAction);

private slots:
  void onFileDialogRequested() {
    auto names =
        QFileDialog::getOpenFileName(this, "Open file", QDir::currentPath());

    qDebug() << names;
  }