Multi-step form with Iframe

Hey everyone!
i designed a multi-step form which in the “success message” I put an Iframe.
the problem is in the last step of the form - when submitting, somthing goes wrong.
it used to work when i tried it at first time… this is very frustrating

video of the bug: or shpitz bug.m4v - Google Drive

Preview link webflow : https://preview.webflow.com/preview/orshpitz?utm_source=orshpitz&preview=df9083b8d2da4aa2b2718537d9095caa

live site: www.orshpitz.co.il
screen shot from inspect:

thanks!

JanneWassberg any help?

someone ?