Known Visitor - intermittently appending an extra /page-name to the form confirmation page

Question

We discovered an intermittent issue with our forms that have known visitor. When a user submits the form as a known visitor sometimes it appends an extra /confirmation-page to the end of the confirmation url thus creating a 404 error

Form for testing:
calendly.com/landing/form

Thanks in advance!

SanfordWhiteman · Accepted Answer

Wait, you don't mean the literal values /page-name or /confirmation-page, right?

You mean it repeats the path of the confirmation page, whatever that is - so it should be /mythankyou but instead it's /mythankyou/mythankyou, if it’s supposed to be /otherthankyou it becomes /otherthankyou/otherthankyou, etc.

This is happening because your code has a bug that causes the visitor to be redirected

first to the confirmation page
then immediately to the confirmation page’s (nonexistent) confirmation page

This logic, packaged in this file, runs on the confirmation page as well as on the form page:

if (isKnownVisitor) {
  window.localStorage.setItem('firstName', knownFirstName);
  navigate(`thank-you?firstName=${knownFirstName}`);
} else {
  window.localStorage.setItem('firstName', values.FirstName);
  navigate(`thank-you?firstName=${values.FirstName}`);
}

If you look in Dev Tools » Network you can see there are two pages loaded in quick succession after a form submit. The second is the 404, /thank-you/thank-you.

SanfordWhiteman · Answer

Can you first check in the form settings to make sure you don’t have Advanced Thank You choices?

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