Here's something you can try, unsure if it'll work.
1. Add a button to the form with visibility set to false. Hook up the path of the button back to the form you want to navigate to
2. Add a custom javascript event for "onclick" that finds that hidden control and forces a click. Assuming the Control ID of the hiddent button is "woohoo" (no double quotes), the JS would be:
var button = document.getElementById('woohoo');
button.click();
There's probably better ways to do this in Workflow, but this is a JS route if there was one.