The Builder extension actually has nothing with the Frontend Submission extension. Because the Frontend Submission uses a shortcode to display the form. And the fields "Post Title" and "Post Featured Image" are set in the shortcode. They're not part of the meta box, so Builder can't help.
We're having a problem when cloning a group, which has a cloned wysiwyg field. The generated ID for the wysiwyg must be unique. We're trying our best to fix it this week. We'll keep you posted.
If you're in a loop and called the function $query->the_post(), then you don't need to pass any variable. The current post ID (retrieved via get_the_ID()) is passed by default.
If that doesn't work, please post the code you use in the loop.
