Change 410455 had a related patch set uploaded (by Esanders; owner: Esanders):
[mediawiki/extensions/3D@master] Don't attempt to attach badge to MMV canvas

https://gerrit.wikimedia.org/r/410455

The above patch fixes the issue by not attempting to draw the badge in MMV. One could perhaps rewrite this to work in future, but the most pressing issue is these 404 requests.

Change 410481 had a related patch set uploaded (by Matthias Mullie; owner: Matthias Mullie):
[mediawiki/extensions/3D@master] Only wait for thumb load for imgs

https://gerrit.wikimedia.org/r/410481

Change 410491 had a related patch set uploaded (by Esanders; owner: Esanders):
[mediawiki/extensions/3D@master] Allow attachBadge to be passed a non-image

https://gerrit.wikimedia.org/r/410491

Change 410481 abandoned by Matthias Mullie:
Only wait for thumb load for imgs

Reason:
See https://gerrit.wikimedia.org/r/#/c/410491/

https://gerrit.wikimedia.org/r/410481

Change 410491 merged by jenkins-bot:
[mediawiki/extensions/3D@master] Allow attachBadge to be passed a non-image

https://gerrit.wikimedia.org/r/410491

Change 410455 abandoned by Esanders:
Don't attempt to attach badge to MMV canvas

Reason:
https://gerrit.wikimedia.org/r/#/c/410491/ fixed the badge instead

https://gerrit.wikimedia.org/r/410455

Issue is still current; fix presumably got rolled back by the rollback of 1.31-wmf.22 (T183961)?

Yeah, that was going to be part of wmf.22

Should we backport to wmf.21? It looks like wmf.22 is still blocked as of right now.