Downloading *.btcpay plugin packages fails in local environment, 302 redirect is not followed

[rockstardev]

When the Download method is invoked, we return a 302 redirect to the URL of the *.btcpay package:

btcpayserver-plugin-builder/PluginBuilder/Controllers/ApiController.cs

Line 126 in 67f502e

return Redirect(url);

When running btcpayserver-plugin-builder locally and hitting this method from another local BTCPay Server instance (in debug mode), the result is an HTTP 302 response to:
http://127.0.0.1:32827/satoshi/artifacts/admin-pass-reset/3/*.btcpay

On the other hand, using the default instance (https://plugin-builder.btcpayserver.org) returns an HTTP 200 with the content of the *.btcpay package.

This isn’t a showstopper, as you can manually download the package and place it in the Roaming\BTCPayServer\Plugins\ folder. However, the different behavior complicates testing and debugging. I'm documenting this for future exploration and better understanding of why this happens.

[rockstardev]

I did debug how AllowAutoRedirect of HttpClient... and it is set to true.