QQuickWidget: shortcut override events gone missing

#include <QtWidgets>
#include <QtQuickWidgets>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QMainWindow window;

    const QList<Qt::Key> keys = {Qt::Key_Space, Qt::Key_Backspace};
    for (Qt::Key key : keys) {
        QShortcut *shortcut = new QShortcut(key, &window);
        QObject::connect(shortcut, &QShortcut::activated, [=]() {
            qDebug() << "QShortcut::activated:" << shortcut->key();
        });
    }

    QQuickWidget widget;
    QQmlComponent component(widget.engine());
    component.setData("import QtQuick.Controls 2.0; TextField { focus: true; text: 'Press (back)space...' }", QUrl());
    widget.setContent(QUrl(), &component, component.create());

    window.setCentralWidget(&widget);
    window.show();
    return app.exec();
}