Narrator stops working on UI when adding a native widget

#include <QApplication>
#include <QWidget>
#include <QLabel>
#include <QVBoxLayout>

class QNativeWidget : public QWidget
{
public:
    QNativeWidget()
    {
        winId();
        QVBoxLayout* l = new QVBoxLayout(this);
        l->addWidget(new QLabel("native"));
    }
};

class QTestView : public QWidget
{
public:
    QTestView()
    {
        QVBoxLayout* l = new QVBoxLayout(this);
        l->addWidget(new QPushButton("Some Button"));
        auto *b = new QPushButton("Press to add native widget");
        l->addWidget(b);        
        QObject::connect(b, &QPushButton::clicked, [l]()
            {
                auto* nativeWidget = new QNativeWidget();
                l->addWidget(nativeWidget);
            });
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTestView w;    
    w.show();
    return a.exec();
}