I have a view created under the case entity and I added a field from the related entity Contract ('City' - a text field). I created a chart from within the view and added the city field on the y axis. I want to count the number of cases in each city. On the view, when drilling down, I can see the the original fields from the view.

I added this chart to a dashboard I created. When attempting to drill down however, I cannot see the original fields from the view. I can only see all fields under the case entity. Why is this occurring? Is this expected behavior?

Do I need to modify the XML? As the XML does not mention anything about the related entity attribute for the chart.