Top 50 medications breakdown doesn't return results

When you run a query and select "Top 50 medications breakdown" the query will return but the breakdown will not display in the Graph Results or on the Query Report.

Steps to reproduce:

1. Add a concept to a panel in the Query Tool.
2. Click on Run Query
3. Select Top 50 medications breakdown
4. Notice when the query finishes the breakdown doesn't display in the Graph results or Query Report