return $value;
}
- if ( empty( $_REQUEST['_thumbnail_id'] ) || $post->ID != $post_id || '_thumbnail_id' != $meta_key || 'revision' == $post->post_type ) {
+ if ( empty( $_REQUEST['_thumbnail_id'] ) ||
+ empty( $_REQUEST['preview_id'] ) ||
+ $post->ID != $post_id ||
+ '_thumbnail_id' != $meta_key ||
+ 'revision' == $post->post_type ||
+ $post_id != $_REQUEST['preview_id']
+ ) {
return $value;
}