There is a log call introduced in 8cda77d that uses PathAndQuery property of created request.

But HttpRequest created by factory is relative URI, so on attempts to call ObserveLines I'm getting exception in Observable OnError:
Unexpected error while streaming from the Kubernetes API to \"watch v1/Endpoints 'some-service' in namespace dev\".","exceptions":["System.InvalidOperationException: This operation is not supported for a relative URI."," at System.Uri.get_PathAndQuery()"," at KubeClient.ResourceClients.KubeResourceClient.<>c__DisplayClass30_0.<<ObserveLines>b__0>d.MoveNext()