[Upfront] Contact form content is sent to admin insted email in Send form content to:

I have a webpage made with Upfront theme and "Contact us" page on it.
There is Contact form on this page and I put a custom email address to "Send form content to:" field in Contact Element.
But when I save theme changes this email is not saved. If I try to fill the form and submit it, content is sent to WP admin email.
Why custom email address is not saved?
Thank you.