Validator hangs on complex audio + annotations manifest

[saracarl]

We're using this example manifest for some AVAnnotate development.

The manifest that contains 2 canvases with an audio file each, 2 structures (the latter spans both canvases) and annotations on both canvases. The annotations are inline rather than in separate files to be dereferenced. We've tested it out in Mirador, which is able to display the canvases, play the media, show the structures, and displays the annotations.

The web validator hangs when asked to validate this manifest.

A previous iteration of the manifest that just had structures did pass validation.

[glenrobson]

Also this one is failing:

https://avalon.lib.virginia.edu/media_objects/hh63sw00x/manifest.json