I noticed in OD-2313 that if there is an error loading an image, clicking it to reload it (maybe only if it still doesn't load successfully?) will have the markdown-image-loading div stick around forever.

Aside, as an infrastructure issue, that particular image from that issue returns error 500, but the images I uploaded here seem fine... Maybe related to OD-156?

Does the file not exist? In my opinion, it should return 404 if an attachment doesn't exist, instead of 500, if that's still how it works. Makes me think there is something wrong.