Could not hover on QMenu in a modal dialog

[Sivan]

Hi all,

I have just recently upgraded to Qt-5.15.2 from Qt-5.4.1 and noticed that I could not hover on a menu which is executed from a modal dialog.
Here is my example code:

class MyDialog : public QDialog
{
public:
    explicit MyDialog(QWidget* parent = nullptr) : QDialog(parent)
    {
        setMinimumSize(300, 300);
    }

    virtual ~MyDialog()
    {
    }

protected:
    virtual void mousePressEvent(QMouseEvent* event) override
    {
        QDialog::mousePressEvent(event);

        if (event->button() == Qt::RightButton)
        {
            QMenu menu;
            menu.addAction("Action 1");
            menu.addAction("Action 2");
            menu.addAction("Action 3");

            menu.exec(QCursor::pos());
        }
    }
};

///////////////////////////////////////////////////////////////////////////
Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    setMinimumSize(500, 500);
    QPushButton* btn = new QPushButton("Press", this);
    btn->setGeometry(0, 0, 60, 30);

    MyDialog* dlg = new MyDialog(this);
    dlg->hide();

    connect(btn, &QPushButton::clicked, dlg, &MyDialog::exec);
}

Widget::~Widget()
{
}

The above issue only happens when the menu is launched on a modal dialog. It does not happen on a modeless widget/dialog. The current workaround for this issue that I have found so far is to create the menu with a parent. For example,

QMenu menu(this);

So I would like to understand if this is a Qt bug or am I missing anything. It worked in Qt-5.4.1.
Thanks in advance for the advice / help.

[SGaist]

Hi,

Which OS are you running your code on ?

[Sivan]

Sorry forgot to mention that. I am running on MacOS Catalina 10.15.7

[Sivan]

Filed a bug in https://bugreports.qt.io/browse/QTBUG-94375