Hi there,
We are seeing a strange issue with our 6.x server instance of Confluence.
Every now and then we see users are creating duplicate images on pages that have illustrations added on them. These are supposed to be ordinar readers not editors. Unfortunately, these users themselves have to clue on what on Earth has caused the dupes to appear on the page.
For example, here is a sample illustration existing on the page:

If we look into page attachments we'll find a copy of that image added to the attachments on this original page:

Note the index added to the image file name -- [1]. This image2018-11-16_20_29-16[1].png file is a copy of the original illustration that existed on the page.
Does anyone have any clue on what could cause this?
Thank you.