Disabled components are not grayed in Light mode

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

    // Fix the issue
    // app.setStyle(app.style()->name());

    QWidget widget;
    QVBoxLayout layout(&widget);

    QLabel label1("test enabled");
    layout.addWidget(&label1);

    QLabel label2("test disabled");
    label2.setEnabled(false);
    layout.addWidget(&label2);

    widget.show();
    
    app.exec();
}