Can't publish a scene with the default duck

[Exairnous]

If a model element is used with a url to the default sketchfab duck the scene will fail to publish with the error:
Error exporting scene:
Cause:
Failed to fetch

The same model element with the url to the octopus sandwich works fine

Note: the default duck works fine in the spawner element.

Edit: on trying this in a new scene the duck wouldn't even load in spoke and errored out on both spawner and model elements.

This may be related to #1032

default duck:
https://sketchfab.com/models/a4c500d7358a4a199b6a5cd35f416466

octupus sandwich:
https://sketchfab.com/models/39c90a98d0e349819222cbfd9ad1803c