Images re-uploaded by drag and drop on IE as a copy attachment

1. Attach an image to a page
2. Insert the image to the page content using Files and Images macro
3. Left click (hold it) on the image, drag it to the blank area of the page and drop
4. The Inserting Attachment window will show up and the same attachment will be re-uploaded

This was only replicated on Internet Explorer. On my test in a local instance, used IE 11.

Refer to the screencast created by the customer for more details on this issue.