Hello there,
I have added the addon inside a row for testing purpose and used the same Recipient Email and checked. Guess what! It worked completely fine. See the screenshot here for a better understanding.
Another thing, I need to mention, why did you add a module for just a form builder whether you can simply add the addon inside a row? You can even save the form-builder row for using it multiple times wherever you want to as I can see you are using the form in every pages of your site. See the blog post here to understand how it works.
Check at your end and let us know the update.
Thanks!