Hi John, thanks for the advice. I edited my functions.php like below:
function my_acf_save_post( $post_id ) {
$post_title = get_the_title( $post_id );
update_field('titel_acf', $post_title, $post_id);
return $post_title;
}
add_action('acf/save_post', 'my_acf_save_post', 20);
The field titel_acf still does not get updated 🙁
