changing order of images

I uploaded to version 2.8.1.0 which was supposed to add the ability to rearrange the order of images uploaded when editing a post on the front-end. When in edit mode, I do see the icon for dragging the thumbnails around. However, the thumbnails don’t move when I try to drag them. Hovering over a thumbnail shows the drag & drop cursor yet it doesn’t allow me to drag the thumbnail.