Apr 04, 2017
Sep 25, 2017
Closed, Fixed and tested
Somehow, you have blocks and/or media in the "For this page" folder that you cannot delete. To verify this, create a new page and look in the "For this page" folder. If it has a block or media file before you add anything, you're affected by this bug. This forum thread reports images that are always visible on newly-created pages and blocks:
This bug fix lets users cut/copy/delete non-folder content that has the content asset root as parent link.