When dragging new photos into the photo galleries and also sometimes into duplicate or cloned text panel the new picture often changes another picture in the gallery or another panel.

It is possible to break the link but it varies in method and success causing much frustration.

In other cases changing the one of the pictures in the gallery I have found several other of the pop-up pictures have changed despite the thumbnail staying the same. This wastes a lot of time becausee you can't see the error until you have exported the website and previewed it.