Journey Task Report is not showing DFF field values

Summary:

Hi Team,

I am building a Report which contains Context segment DFF from Per_Person_Allocated_tasks_DFF. In Reports and Analytics>Report, when I run the Report with sample data, I am able to see the expected DFF values populating. But after attaching the report path to the journey task and then testing it in Journey Task UI, I clicked on See Document which navigates me to the Report. I do not see DFF field values populating in the report there. Other fields are populating as expected. Can someone please help me debug this? Below is the subquery i used for pulling the DFF in select