At a certain zoom level or sufficiently small browser window, respectively, author and editor information do not fit side-by-side anymore and get placed on top of each other. So far so good. However if this happens, the editor goes on top, thus taking the position where you would normally expect the author:
This is exacerbated if you scroll such that the author information is hidden.
Please place the editor information below the author information in this case. This would also take care of the irritating gap if the editor is the author: