Yes, I am using the iOS version of the app so that could be the difference.
The images load fine for me but only if logged in to my account. Not sure why they aren't showing up properly... The image I see if logged out is some triangle that has a file name of "image_unmoderated.gif". I wonder if the mods have put some kind of filter on images until approved? I'll message them.
In the mean time I've uploaded the images to Imgur and that seems to work.