Hi again
I also tried this…
global $post_id;
$post_id = $_GET['post'];
add_filter('acf/load_field/key=field_5bf31d5e8e1eb', function ( $field ) use ($post_id) {
$related_ids = get_field( 'ARTrelationship_SRCrelationship', $post_id ); //Will not work (it removes the default selection and replaces them with 'No results found')
// this still works
$related_ids = get_field( 'ARTrelationship_SRCrelationship', 14341 ); //Works and adds 'Lithograph' and 'Etching'
