They’re showing as an external link for me (on liftoff) that I have to click through to display. Whereas previously they were an image directly in the post.

Looking at the URLs, both types of image are webp’s hosted on sh.itjust.works, the only difference is the new ones have an additional format=jpeg parameter. I think the errors are on our side (ie the user’s apps, not the uploader’s), to treat these posts the same.