When you tap an image on the wikipedia app on iphone the caption shown is the description of the image on wikimedia, not the caption from the article as would be expected. This behavior is contrary to how things work when you tap a thumbnail on desktop, where the article caption is correctly used.

The behavior is a serious problem because image descriptions do not include the context of the article and are often not appropriate for end user display. Wikipedia editors don't see image descriptions when writing articles, and image owners on wikimedia often use descriptions to describe how the image was created instead of anything that would be useful to an end user.