Wikitext added to image captions is nowikied in the same way that markup added to the page body is. e.g. https://en.wikipedia.org/w/index.php?title=User%3AThryduulf%2Fsandbox&diff=578947711&oldid=574091986 however the wikitext warning is not generated.
- Load any page with an image in VE
- Edit the image caption
- Add any wiki markup in the caption (tested with bold, italic and links)
Expected behaviour: The wikitext warning pops up.
Action behaviour: Nothing happens
If popping up the warning while in the image caption dialog is not possible, then it should do so immediately the dialog is closed. Displaying it at the same time would be preferable though.