As a story grows, more story arcs, more chapters, usually the list of tags grows as well, and it can overload the sidebar within a chapter, so that you have to scroll down a lot to actually get to the other information and the comments. My suggestion would be to take a functionality, that is already present on the "Search" page, and apply it here as well: Just shorten the list of tags to one line, with the option to extend it by pressing "More": Example of the current sidebar with many tags:
If you decide to implement this suggestion, a tiny bit of the gained space could be used for an additional list of tags: Just the tags from that single chapter itself, i.e.: "Chapter Tags: xxx, xxx, x... More" Unless the "about" page is generated for the whole story and identical on each chapter, than this clearly wouldn't be as easy to implement.
