When parameters are passed through the interactive form components, it is very useful for debugging to see what has been passed if you end up with an unhandled error in the called form and the user encounters the default error page. However, the parameter listing is only visible if the "Show progress message" button has not been checked when selecting the Work Protocol.  

The end result is that if you've properly shown a click-response to a user when you know that a protocol may take more than a second or so to run, they send you screenshots that are useless for debugging. Then you have to edit the form, uncheck the box, and ask them to re-create the error to see what was passed in. 

Please make the passed parameters come through to the error page (or the "No result" page) no matter whether or not a progress message is displayed after submitting.