Crash when reparent a native child to a different tlw if QT_WIDGETS_RHI=1 is set on Windows

#include <QtWidgets/QApplication>
#include <QtWidgets/QWidget>
#include <QtCore/QTimer>

int main(int argc, char** argv)
{
    // QT_WIDGETS_RHI is the suggested workaround to avoid re-creating native windows in Qt 6.5.
    // Windows: DX11 RHI. This is the default. Just to make sure DX11 is used.
    // All native windows will have a DX11 swapchain.
    qputenv("QT_WIDGETS_RHI", "1");
    qputenv("QT_WIDGETS_RHI_BACKEND", "d3d11");

    QApplication app(argc, argv);

    // The first top-level window with a native child.
    QWidget tlw1;
    tlw1.resize(640, 480);
    tlw1.setStyleSheet("QWidget { background-color: red; }");

    // The child is a native window. QT_WIDGETS_RHI=1 so it's RHI flush.
    QWidget child(&tlw1);
    child.setGeometry(0, 0, 640, 480);
    child.setStyleSheet("QWidget { background-color: green; }");
    child.winId();

    // Wait for the child to show. RHI flush will create a DX11 swapchain for the child native window.
    // But the swap chain is owned by tlw1.
    QTimer::singleShot(1000, [&]() {
        // The second top-level window.
        QWidget* tlw2 = new QWidget();
        tlw2->resize(640, 480);
        tlw2->setStyleSheet("QWidget { background-color: blue; }");

        // Now reparent the native child from tlw1 into tlw2.
        child.setParent(tlw2);
        child.setGeometry(0, 0, 640, 480);

        // Show the second top-level window.
        tlw2->show();

        // Qt will create a new DX11 swap chain for the native child window in tlw2. But there is already a
        // swap chain and it's not released.
        // Windows will return Access Denied error when calling CreateSwapChainForHwnd().

        // Failed to create D3D11 swapchain: COM error 0x80070005: Access is denied.
        // Failed to create swapchain for window flushed with an RHI - enabled backingstore
        // Crash in RHI flush.
    });

    tlw1.show();
    return app.exec();
}

#include <QtWidgets/QApplication>
#include <QtWidgets/QWidget>
#include <QtCore/QTimer>
#include <QtWebEngineWidgets/QWebEngineView>

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

    // The first top-level window with a native child.
    QWidget tlw1;
    tlw1.resize(640, 480);
    tlw1.setStyleSheet("QWidget { background-color: red; }");

    // The child is a native window.
    QWidget child(&tlw1);
    child.setGeometry(0, 0, 640, 480);
    child.setStyleSheet("QWidget { background-color: green; }");
    child.winId();

    // This will cause both tlw and the native child to be RHI flush.
    QWebEngineView web(&child);
    web.setGeometry(0, 0, 640, 480);
    web.setUrl(QUrl("chrome://gpu"));

    // Wait for the child to show. RHI flush will create a DX11 swapchain for the child native window.
    // But the swap chain is owned by tlw1.
    QTimer::singleShot(1000, [&]() {
        // The second top-level window.
        QWidget* tlw2 = new QWidget();
        tlw2->resize(640, 480);
        tlw2->setStyleSheet("QWidget { background-color: blue; }");

        // Now reparent the native child from tlw1 into tlw2.
        child.setParent(tlw2);
        child.setGeometry(0, 0, 640, 480);

        // Show the second top-level window.
        tlw2->show();

        // Qt will create a new DX11 swap chain for the native child window in tlw2. But there is already a
        // swap chain and it's not released.
        // Windows will return Access Denied error when calling CreateSwapChainForHwnd().

        // Failed to create D3D11 swapchain: COM error 0x80070005: Access is denied.
        // Failed to create swapchain for window flushed with an RHI - enabled backingstore
        // Crash in RHI flush.
    });

    tlw1.show();
    return app.exec();
}