Typeform URL Redirect NOT Working (with hidden fields and parameters)

I would love any help with someone who has figured this out. 

We are experiencing a major issue with Typeform’s URL redirect NOT working as of June 22nd 9am PT.

Original flow:

1. User creates an account on our site and user_id is created as a hidden field
2. User is directed to complete a Typeform
3. Upon completion of Typeform, user should be redirected to a page in our web application, along with the user_id and the parameters they just filled out

What’s happening:

1. User creates an account on our site and user_id is created as a hidden field
2. User is directed to complete a Typeform
3. Upon completion of Typeform, user is going through an infinite loop, being redirected to the first question of the Typeform, instead of be redirected to a page in our web app 

This issue is preventing new user account creation and we have no idea what to do. Please help!!