I'm using the option to upload images on a certain entity (add image for an observation of some kind) with a certain text. When I'd like to review this observation in a popup (because the data isn't that much to justify a full screen) all works well until I press the thumbnail. It enlarges it but only in the back of the popup in a new screen. Any experience with this behaviour?
Kind regards and all the best
While I haven't seen this myself, I assume the enlarged image div is probably created somewhere within the background page's body rather than the pop-up's body. I suggest you find the enlarged image's HTML element and classes and use a high positive z-index CSS property to bring it to the front.
Hope this helps.