Ordering by connection not working

[jeffstieler]

It appears that letting O2O form the query for ordering by connection sort is no longer working.

The find_in_set used in the SQL doesn't return the posts in the correct order.

Example query generated by O2O: SELECT wp_posts.ID FROM wp_posts WHERE 1=1 AND wp_posts.ID IN (338,249,243) AND wp_posts.post_type = 'post' AND ((wp_posts.post_status = 'publish')) ORDER BY find_in_set(wp_posts.ID, '338, 249, 243') ASC LIMIT 0, 9

This resulted in an order of 243, 249, 338.

The actual connection order can be queried by relying on 'orderby' => 'post__in' - so that might be a possible solution.