I found prblem with image in copied article. I have an article (let's call News1) with image added in tab "Helix Blog Options". When I save this article as News2 with "Save as Copy" and then would to change image in tab "Helix Blog Options", have to use "Remove image" button. After that I get notification "You are about to permanently delete this item. 'Cancel' to stop, 'OK' to delete". And when confirm, ORIGIN image is removed. i.e. when I go to News1 Helix there is a missing image icon.

I understand "Save as Copy" is Joomla function and just copying whole article with parameters but maybe you can try to improve image removing function. It could check if removed image is already used in other article then leave it or asking user if he want to keep it or replace.