Must-use plugin for WordPress to flush fields and post meta when using Advanced Custom Fields

acf_object_cache_fix.php

<?php
/**
  * Plugin Name: WP ACF Obj Cache Fix
  * Plugin URI:  http://bitpiston.com/
  * Description: Fix for Advanced Custom Fields expiry with 3rd party Object Caches.
  * Author:      BitPiston Studios
  * Author URI:  http://bitpiston.com/
  * Version:     1.1.1
  * Licence:     BSD
  */

// Fix for Object Cache not flushing fields:
add_action( "acf/update_field", function( $field ) {
    wp_cache_delete( 'load_field/key=' . $field['key'], 'acf' );
    return $field;
}, 5, 1 );

// Flush post meta when saving a post:
add_action( "acf/save_post", function( $post_id ) {
    wp_cache_delete( $post_id, 'post_meta' );
}, 20, 1 );

Both these issues appear to still exist under v5.