Embedded QuickView in tabbed dockwidget does not appear when using winId

I am implementing a 3D application using osg with a main window, a dockWidget that embeds a QQuickView using QWidget::createWindowContainer, and another dock widget. The content of the embedded QQuickView disappears when I tab both dockWidgets. This happens only when I use QWidget::winId(), which is needed in my case.