If you are clicking on a link, then that is going to navigate away from the clone collection. When you return, a new clone collection would get created. You can't really iterate a collection if it is changing while iterating it. This one may get tricky. Since the clone collection isn't in a guaranteed order, you'll need to come up with some other way to identify each image that you are clicking on. Perhaps the ElementID of each link is unique to each image. If that's the case, you can iterate that.