Maybe I've been on the wrong path but using MB Frontend Submissions in combination with custom fields leads me to the point where I would like to hide the heading programmatically.
So I wondered if it was possible to to something like "remove_action('rwmb_before_user-default', array('MBUM\MetaBox','show_heading'), 10)"?
Maybe my its a bit too late but I cannot wrap my head around on how exactly I need to put it?