Note 1

<?php

addaction('acfe/fields/postobject/customsave/name=feature', 'myacfpostobjectnewpostaction', 10, 4);
function myacfpostobjectnewpostaction($newpostid, $title, $postid, $field){
/**
* @bool $newpostid Newly created Post ID
* @string $title Post title
* @bool/string $postid Current Post ID
* @array $field Field array
*/
updatefield('feature', $title, $newpostid);
}