function my_post_title_updater( $post_id ) {

$my_post = array();
$my_post['ID'] = $post_id;

$recipe_name       = get_field('recipe_name');

if ( get_post_type() == 'recipe' ) {
  $my_post['post_title'] = get_field('recipe_name');
}

// Update the post into the database
wp_update_post( $my_post );

}
// run after ACF saves the $_POST['fields'] data
add_action('acf/save_post', 'my_post_title_updater', 20);

function slug_save_post_callback( $post_ID, $post, $update ) {
// allow 'publish', 'draft', 'future'
if ($post->post_type != 'recipe' || $post->post_status == 'auto-draft')
    return;

// only change slug when the post is created (both dates are equal)
if ($post->post_date_gmt != $post->post_modified_gmt)
    return;

// use title, since $post->post_name might have unique numbers added
$new_slug = sanitize_title( $post->post_title, $post_ID );
$subtitle = sanitize_title( get_field( 'subtitle', $post_ID ), '' );
if (empty( $subtitle ) || strpos( $new_slug, $subtitle ) !== false)
    return; // No subtitle or already in slug

$new_slug .= '-' . $subtitle;
if ($new_slug == $post->post_name)
    return; // already set

// unhook this function to prevent infinite looping
remove_action( 'acf/save_post', 'slug_save_post_callback', 21, 3 );
// update the post slug (WP handles unique post slug)
wp_update_post( array(
    'ID' => $post_ID,
    'post_name' => $new_slug
));
// re-hook this function
add_action( 'acf/save_post', 'slug_save_post_callback', 21, 3 );
}
add_action( 'acf/save_post', 'slug_save_post_callback', 21, 3 );

function recipe_update_title( $value, $post_id, $field ) {

$new_title = get_field( 'recipe_name', $post_id) . ' ' . $value;
$new_slug = sanitize_title( $new_title );

// update post
$recipe_postdata = array(
    'ID'          => $post_id,
    'post_title'  => $new_title,
    'post_name'   => $new_slug,
);

if ( ! wp_is_post_revision( $post_id ) ){

    // unhook this function so it doesn't loop infinitely
    remove_action('save_post', 'recipe_update_title');

    // update the post, which calls save_post again
    wp_update_post( $recipe_postdata );

    // re-hook this function
    add_action('save_post', 'recipe_update_title');
}

return $value;
}

add_filter('acf/update_value/name=recipe_featured_image', 'recipe_update_title', 10, 3);