Test Auth demo not working as expected

Reading the documentation about Netlify Identity, I was very excited to see this blog post about how to gate certain pages. extra excited to find out there was a live DEMO! but pulled back to reality when I realized the demo doesn’t work correctly.

My expectation is that visiting the Test Auth page will redirect me to the Login page. This does not happen.

(upload://apaR1PgQ4pX3CtPov7MB9mMgfLK.png)

Has the implementation of the Netlify Identity changed since the blog post was written? Was the example ever working? Is there additional documentation that I missed? The blog post is from Netlify and linked to in the Netlify documentation, so it seems to be an official way to handle this, but it does not work.