Editable QComboBox popup immediately closes itself after a click

If there is an editable QComboBox, tapping / pressing once on it, causes the popup list to flash quickly,
as the popup is opened and then immediately closed.

With this kind of example implementation it is easy to repro:

    QComboBox *comboBoxEditable = new QComboBox(this);
    comboBoxEditable->addItem("item1");
    comboBoxEditable->addItem("item2");
    comboBoxEditable->setStyleSheet(comboBoxStyle);
    comboBoxEditable->setEditable(true);

If setEditable(true) is removed, the popup is opened and remains open.
Also, if user keeps his finger down / keeps pressing the button, it is possible to navigate the popup itemlist.