Advanced Custom Fields - Taxonomy Fields Are Blank in Secondary Languages

Overview of the issue

When using Advanced Custom Fields with WPML, taxonomy fields assigned to custom post types may appear blank in secondary languages. This occurs despite setting the field to «Copy» or «Copy Once».

Workaround

Please, make sure of having a full site backup of your site before proceeding.

• Open …/wp-content/plugins/acfml/classes/class-wpml-acf-worker.php file.
• Look for line 80.
• Replace:

  		$metaValue          = get_metadata( $metaType, $objectToId, $metaKey, true );
  

• With:

  		wp_cache_delete( $objectToId, $metaType. '_meta' );
  		$metaValue          = get_metadata( $metaType, $objectToId, $metaKey, true );