Query Builder not returning Assigned Activities in sub-workflow

I am using Windchill PDMLink Release 13.0 and Datecode with CPS 13.0.2.3

I am generating a report of assigned tasks, but none of the tasks running in a sub-workflow (a workflow running inside another workflow) appear in the report. I am using the "Wf Assigned Activity" type in the report and it works for all other tasks in that workflow. The tasks in the sub-workflow are also assigned. If I use the "Wf Activity" type I can see those tasks in the report, but I get extraneous data and then can't get assigned user information that I need. Is there another relationship I need in Query Builder to get tasks in a sub-workflow?