Child quick widget fails to draw if it's child of raster native widget

#include <QtWidgets/QApplication>
#include <QtWidgets/QWidget>
#include <QtGui/QOpenGLFunctions>
#include <QtGUI/QPainter>
#include <QtOpenGLWidgets/QOpenGLWidget>

class RedWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
public:
    explicit RedWidget(QWidget* parent)
        : QOpenGLWidget(parent)
    {}
    void initializeGL() override
    {
        initializeOpenGLFunctions();
        glClearColor(1, 0, 0, 1);
    }
    void paintGL() override
    {
        glClear(GL_COLOR_BUFFER_BIT);
    }
};

class GreenWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
public:
    explicit GreenWidget(QWidget* parent)
        : QOpenGLWidget(parent)
    {}
    void initializeGL() override
    {
        initializeOpenGLFunctions();
        glClearColor(0, 1, 0, 1);
    }
    void paintGL() override
    {
        glClear(GL_COLOR_BUFFER_BIT);
    }
};

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

    // tlw. By default, it's raster.
    QWidget tlw;
    tlw.resize(640, 480);
    tlw.winId();

    // OpenGL child of tlw. tlw is turned into OpenGL RHI.
    RedWidget red(&tlw);
    red.setGeometry(0, 0, 640, 160);

    // Raster native child of tlw. It's raster.
    QWidget blue_native(&tlw);
    blue_native.setStyleSheet("QWidget { background-color: blue; }");
    blue_native.setGeometry(0, 160, 640, 320);
    blue_native.winId();

    // OpenGL child of raster native child. setParent() checks the surface type of tlw. It's already OpenGL.
    // Backing store flush to blue_native instead of tlw. In this case, the window hierarchy is not
    // re-created. blue_native is still raster and fail to show green.
    GreenWidget green(&blue_native);
    green.setGeometry(0, 160, 640, 160);

    /*
     Expect result:
       ----------
          red
       ----------
          blue
       ----------
          green
     */
    /*
     Got:
       ----------
          red
       ----------
          blue
       ----------
          black
     */

    tlw.show();
    return app.exec();
}