QSvgRenderer::boundsOnElement() can return wrong results with multiple child <text> elements

#include <QGuiApplication>
#include <QSvgRenderer>
#include <QDebug>

int main(int argc, char *argv[])
{
    QGuiApplication a(argc, argv);

    const QByteArrayList elements{
        R"x(<text id="x" transform="matrix(0 -1 1 0 16 27.5)" font-family="Arial" font-size="10px">X</text>)x",
        R"y(<text id="y" transform="matrix(0 -1 1 0 27.5 27.5)" font-family="Arial" font-size="10px">Y</text>)y"
    };

    for (int i = 0; i < 3; ++i)
    {
        QByteArray data = R"header(<svg xmlns="http://www.w3.org/2000/svg"><g id="all">)header";
        if (i % 2 == 0)
            data += elements[0];
        if (i > 0)
            data += elements[1];
        data += "</g></svg>";

        qDebug() << "=== Test" << i << "===";
        qDebug() << data;

        QSvgRenderer renderer(data);

        QRectF unionRect;
        if (renderer.elementExists("x"))
        {
            auto xRect = renderer.boundsOnElement("x");
            qDebug() << "            X:" << xRect;
            unionRect = unionRect.united(xRect);
        }
        if (renderer.elementExists("y"))
        {
            auto yRect = renderer.boundsOnElement("y");
            qDebug() << "            Y:" << yRect;
            unionRect = unionRect.united(yRect);
        }

        qDebug() << "All, method 1:" << unionRect;
        qDebug() << "All, method 2:" << renderer.boundsOnElement("all");
        qDebug("\n");
    }
}