The basic problem is thus: I can specify a _index.md for a category or a tag (i.e., taxonomy terms), but only the categories and tags items that have had the _index.md generate pages. The other taxonomy terms that I want to use the default for are not generated, resulting in a 404 error.

In my config.toml file, I have the following set:

[taxonomies]
  tag = "tags"
  category = "categories"

I will use tags as my example as I do have some custom templates for my categories on my blog.

Under content, I have a folder for tags. Inside tags, I have two folders that match 2 of my approximately 15 tags. Inside these two folders, I have an _index.md file.

When I run hugo (and as can be seen by the current version of my website hosted on gitlab), only the two pages I specified in the /content/tags folder generated pages - not the overall list which is what happens if I remove the /content/tags folder.

For categories, I only had 5 so I specified each in the /contents/categories folder and all of them generated...

For all the taxonomy pages generated, the index.xml (RSS) was created for files that had the _index.md file created, but not for any that didn't.

This is for hugo 0.18.1 and happens on Windows, Ubuntu 16.10, and on the gitlab build server,

https://gitlab.com/jeffreycentex/jeffreycentex.gitlab.io is my current repo that has the issue (Commit c7bfa5d8) and the content is live on https://jeffreycentex.gitlab.io (the tag list is on the main page in the sidebar)