[BUG] Unable to cast object when initialising interface

[marwahaks]

Describe the bug
What am I trying to do: Connect to an api and retrieve data.

In my Test Solution Project, which i have converted from .Net Framework to .Net 5, it gives me this error.
Unable to cast object of type 'UIHelpersRestClientRefitBugIWoofClient' to type 'UI.Helpers.RestClient.RefitBug.IWoofClient.
To diagnose, I've made a standalone project and this works perfectly (same code), so I know this may not be a bug or even a straightforward bug.

namespace UI.Helpers.RestClient.RefitBug
{
    interface IWoofClient
    {
        [Refit.Get("/woof.json")]
        Task<WoofResponseObject> GetDawg();
    }
}

 public WoofClient()
        {
            _baseUrl = new Uri("https://random.dog/");

            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
            {
			//below is where the error occurs
                IWoofClient = Refit.RestService.For<IWoofClient>(
                new HttpClient()
                {
                    BaseAddress = _baseUrl
                });
            }
        }

As I mentioned, this works in the Test Solution that is using .Net Framework.

Environment

OS: Win 10
Visual Studio Pro 16.9.1
.Net 5
Package Version: 6.0.24

[clairernovotny]

I'm going to need a more concrete repro for this