Attributes in Parent and Child Collections

I would like some advise on how to view attributes of parent and child incidents when viewed as a collection.

I've updated the "Results Output Attributes (Collection)" for the "Incident Incident" Object and added both the Parent and Child.

When I view the collection in an Incident (either the parent or child) it only shows in ReferenceID for both in the Collections.

How can I make it show other attributes (e.g. Title, Description, RaiseUser etc.) in the collection?