How to stop thank you page from redirecting

I have redirected the thank you page to a wix webpage but the webpage gets redirected back to the form after a few seconds. how can I stop this?

Thanks for contacting us.

It looks like the issue is related to the redirect URL. I tested a clone of your form with a yahoo.com as redirect link and it did not redirect back to the form. 

My test with your original Wix URL .- https://www.holyhorn.com/events-1/workshop-startup/thank-you-messages/yes

The URL itself seems to be an alias of the original Form URL.- https://www.jotform.com/form/202976170218153

My test using yahoo.com as URL.