Cannot set/use Response URL using client-side server

[Jmclerck]

I have a piece of code that makes two requests in parallel. When I have both responses I use the URL of the response objects to decide how to handle the response data.

I've set up Polly using a client-side server but the response URLs are coming back as empty strings. I have tried a couple of different ways of setting the URL in my generated response objects but nothing seems to work. I am currently digging into the source code to see if I can identify a method of achieving the results I need but I so far haven't found anything.

Am I missing something? I can try and provide a reduced test case if needed.
Is this something that you would consider adding or accepting a PR for?

Thanks!