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())