In the Class.Go To Destination.md file, there should be a note on how this widget handles any parameters that are passed into the Destination.
Is seems like the parameters are passed into the Destination properly and the page renders properly. However the properly rendered page in the browser is displaying the wrong URL. The URL is parent URL with the QueryString parameters removed.
The only reason I went to this help page was to see what the expected behavior is for the Go To Destination widget in regards to the displayed URL for the the Destination.