It's not a huge crisis, but when a short fiction entry in a series is listed as "Book 0", the expandable Series list on the individual volumes does not work properly.

Books 1-8 show the whole series, including all four "Book 0"s:
https://www.worldswithoutend.com/novel.asp?id=2547

But the pages for the four Book 0s do not show the story as part of a series:
https://www.worldswithoutend.com/novel.asp?id=9374