Preview of QScreenCapture with HDR display appears dark

#include <QtMultimediaWidgets>

auto main(int argc, char **argv) -> int
{
    qputenv("QT_MEDIA_BACKEND", "ffmpeg");

    QApplication app{argc, argv};

    QLabel label{"LABEL"};
    label.show();

    QVideoWidget video;

    QScreenCapture capture;
    capture.setActive(true);
    capture.setWindow(label.windowHandle());

    QMediaCaptureSession session;
    session.setScreenCapture(&capture);
    session.setVideoSink(video.videoSink());
    video.show();

    return app.exec();
}