Setting as Featured Image

I am trying to get the cropped image to be set as “Featured Image” I have a submission form which sets the featured image when the the field type is only “image” But when i set it to “Image with user-crop” it no longer registers as the featured image.
here is my code in functions.php:

// Set Featured Image from ACF Field
function acf_set_featured_image( $value, $post_id, $field ) {
if($value != ”){
update_post_meta($post_id, ‘_thumbnail_id’, $value);
} else {
if ( has_post_thumbnail() ) {
delete_post_thumbnail( $post_id);
}
}
return $value;
}
add_filter(‘acf/update_value/name=tsm_featured_image’, ‘acf_set_featured_image’, 10, 3);

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