/tag/name doesn't get redirected to a content collection

Hi there. Here is my custom collections config.

collections:
  /:
    permalink: /{slug}/
    template: index
    filter: tag:-blog
  /blog/:
    permalink: /blog/{slug}/
    template: blog
    filter: primary_tag:blog

Basically, I’m using blog.hbs for posts with primary tag blog and index.hbs for the rest of the posts. According to the documentation, /tag/blog should redirect to /blog, but it doesn’t redirect on my end. Is there something wrong with my custom config?

Ghost version: 3.0.0

Sorry about that. I would need to add data: tag.blog to get it working.