This update is also available for the free version of ACF via our Early Access feature! ACF 5 is compatible with all premium add-ons and will be officially released mid 2018. If possible, please enable Early Access on your websites and update to ACF 5 and let us know about your update experience!
'update_post_term_cache' => false
acf_get_attachment()
function to better match WP coredelete_sub_field()
to fail