It appears the issue is being caused by one of more of the Repeatable Section Fields in your form. We’ve imported and tested your form on our server and all appears to work as expected, although this is a very large form of required fields, and numerous variables may be different from your installation to ours. Additionally, some of the required fields are causing odd errors in Formidable, which may be related or may not.
We’ve also spent a good deal of time dissecting duplicate Field Map Layouts on your site, however, have not yet found the cause of the issue.
Could you assist us in troubleshooting by creating a simpler version of one repeating section form and map it to your form to see if the function is causing the issue?