[quote=@NuttsnBolts]
Depending on the image as well, sometimes they may not show on mobile. This seems to be rare though and only when the URL of the image doesn't end with .jpg, .png, or .gif. Imgur would be a good example as their URLs may either lead to the image directly, or to a page containing the image. 
[/quote]

or if it's a video gif generated by imgur, in the .gifv format. i hate .gifv images with a passion. however, they did mention it was only a recently occurring problem, so it may not have been the image url. also, if it was an error with the image url, it wouldn't have appeared on pc, which it does.

shrug.png