What is the problem?

On the beta version of svgtranslate, I have found with several files that the image does not appear, just the translation form:
https://tools.wmflabs.org/svgtranslate-test/File:Atmosphaerenzusammensetzung.svg
https://tools.wmflabs.org/svgtranslate-test/File:Atmosphere_composition_diagram-en.svg
https://tools.wmflabs.org/svgtranslate-test/File:Culex_pipiens_diagram_en.svg

Those are all files I uploaded to beta commons from their originals on production commons.

Those images do appear in the "production" version.

Loading those pages with devtools in the browser shows no errors in the HTTP requests or JavaScript.

Steps to reproduce problem

Visit any of the above urls.

Expected behavior:Image of the SVG appears on the right.
Observed behavior: No image appears.

Environment

Operating system: Debian Jessie
Browser: Firefox 60 and Chromium 57