QGraphicsSVGItem ignores (some) clipping paths. Why?

[Nicoco]

This SVG image is correctly rendered in Firefox and Inkscape, but for some reason, when using QGraphicsSVGItem without anything fancy, it renders this way:

For reference, this is what it looks like on firefox:

As you can see, the back of the card is not supposed to go beyond the white border.

Am I doing something wrong? Is there a (preferably easy) fix?

A minimal working example, as you can see I am not doing anything fancy at all

import sys
from PyQt5 import QtWidgets, QtCore, Qt, QtGui

app = QtWidgets.QApplication(sys.argv)

scene = QtWidgets.QGraphicsScene()
scene.addItem(Qt.QGraphicsSvgItem("back-red.svg"))

graphics_view = QtWidgets.QGraphicsView()
graphics_view.setScene(scene)
graphics_view.show()

sys.exit(app.exec())