Patch for possible fix for issue #1049 of Pods Framework.

patch-1049.diff

diff --git a/classes/PodsAPI.php b/classes/PodsAPI.php
index 129badf..571bd1a 100644
--- a/classes/PodsAPI.php
+++ b/classes/PodsAPI.php
@@ -3020,9 +3020,7 @@ class PodsAPI {
                                         if ( !empty( $related_ids ) ) {
                                             update_metadata( $object_type, $id, '_pods_' . $related_field[ 'name' ], $related_ids );
 
-                                            foreach ( $related_ids as $rel_id ) {
-                                                add_metadata( $object_type, $id, $related_field[ 'name' ], $rel_id );
-                                            }
+                                            add_metadata( $object_type, $id, $related_field[ 'name' ], $related_ids );
                                         }
                                         else
                                             delete_metadata( $object_type, $id, '_pods_' . $related_field[ 'name' ] );

We add individual meta records for each ID because it makes WP_Query meta_query lookups and our (advanced) JOINs more efficient. As this happens only when you update the item, it's not expensive to do it the right way as I believe we're doing right now.