Incompatible with Duplicator?

That’s interesting. Photon doesn’t actually change the image URLs in your post content, so when deactivating the module you can just go back to using the original images instead of Photon. You can test it by deactivating the module in the original site; the image URLs will go from i0.wp.com/www.mysite.com/images/imagename.jpg. to https://www.mysite.com/images/imagename.jpg.

However, it sounds like Duplicator adds in the Photon domain prefix by itself. I’m not sure why and how, though.
This issue doesn’t seem to appear in their FAQ.

On the cloned site, could you go to Posts > All Posts, locate one of the posts where you experienced issues, open the post in the editor, and check the image URLs under the HTML tab? Do the images use the cloned site URL, or the original site?

The images on the cloned site are using the cloned site URL (with the added i0.wp.com prefix, before I replaced them). The only difference from the norm was the added prefix.

Thanks for the extra details.

Did the prefixes appear in the post editor itself, or did you see it when looking at the posts on your site’s frontend?

The prefixes only appeared on the frontend. The post editor claimed the image URL was pointing to the non-prefix image URL, but the actual frontend post itself was different than the editor.

Removing and re-inserting the image in the post editor seemed to fix it for that particular post, but with hundreds of posts, that’s quite the chore.

The prefixes only appeared on the frontend. The post editor claimed the image URL was pointing to the non-prefix image URL, but the actual frontend post itself was different than the editor.

Ok, good. That’s the expected behaviour when you use Photon or Jetpack’s Tiled Galleries.

Removing and re-inserting the image in the post editor seemed to fix it for that particular post

This is weird. Photon should be applied to all images in the post as long as the module is active, or if you use a Tiled Gallery.

Could you give me a link to one of the posts where you still experience issues, and another where you’ve solved the problem so I can take a closer look?

If you want your site URL to remain private, you can also contact us via this contact form:
https://jetpack.com/contact-support/

Unfortunately, we’ve already used a workaround and fixed all instances of the issue, as we couldn’t afford to leave it too long for proper testing. It should be quite easy to reproduce, simply by Duplicating a site with Photon enabled, but I had to fix it quickly and update our website before we lost too much traffic.

As it stands, the issue itself is “fixed,” but this means I can’t use Photon, which is unfortunate because it would be a really great way to speed up my site.

The website is https://www.solacity.com (I can’t share the test site yet, as it’s blocked for all ip’s but those in the building. I’ll have to talk with the Higher Up’s, so to speak)

I can’t share the test site yet, as it’s blocked for all ip’s but those in the building.

It looks like you just found the source of the problem! ?? Since you’ve restricted access to your site, you’re also blocking Photon from downloading and caching your images. As soon as your site is live, Photon will have access to it as well, and will be able to do its job.

I would consequently recommend that you leave both Photon and the Tiled Galleries modules deactivated for now. That will remove Photon URLs from all your posts. Once your site is live, you can activate the 2 modules again.

I hope this helps.

I can’t believe I didn’t think of that! That would explain why the images work on the live site, but not the test site.

Thanks for your help!