Caching conflict between Duplicate Post and Advanced Custom Fields

When using the Duplicate Post plugin, an ACF’s metas are copied wholesale. At this point, the uniqid() is no longer unique. Therefore, the cache in memory won’t be accurate to all instances of the field.

Request: key all of the field metas with their associated acf post_id as part of the key too.

http://wordpress.org/extend/plugins/advanced-custom-fields/