Unable to set cookie in Dashboard Authentication filter

I am doing something very similar to the following: https://medium.com/we-code/hangfire-dashboard-and-jwt-authentication-751aae3bcd4a

However, the Append cookie call is not persisting between calls

Using ASP.NET Core 3.1

Start with the linked Hangfire Dashboard and JWT authentication example, then inspect the Dashboard authentication filter involved in the ASP.NET Core 3.1 setup. Reproduce the issue and determine why the appended cookie does not persist between calls; done means the cookie remains available on subsequent requests.

Written by the indexing model from the issue text.