I have noticed that searching for authors yields empty pages for some, or lacking several entries for others which CAN be found with other tags. Try sanaeaki or marusa as examples. So many missing items.
Yeah, it's a known fact It's caused by the software, as it's running in debug mode instead of production mode, so "housekeeping" activities like updating tags are not executed Right now the workaround is to search for two tags, for example sanaeaki id:>0