QSvgRenderer::boundsOnElement does not properly calculate the bounding box of a text when it has a transformation

When calling boundsOnElement() on a text, it returns an invalid value when the SVG text uses a transformation instead of x and y

In the attached example, there is three SVG groups, each one composed of a rectangle and two overlapping texts (a blue text that uses x and y and a black text that uses a transformation)

Each element of a given group should have more or less the same bounds because they are all displayed at the same place. BUT text items that use a transformation have an invalid bounding box that does not match the one of the rectangle