[Drupal] Sort according to field node title

Same as term references, node reference fields are sorted occording to the nid, and not the node name.

What we should do to sort by nid :

Since the course field is an entity reference the sort would be working on the node id and not the node name. can you check this.

1. Go to advanced, add a relationship to the content type ( displayed as Content; My content type (field_my_content_type) )
2. Go back to that views field configuration (Or create sort criteria Content: Title) and select the relationship from the drop down. 
3. Go the the format settings and make the new field sortable.

It's tactful for a simple title field sort :/ But good luck !!