Job field empty for one employee but filled for other employee

Summary

In a report the job field for some employees is empty and for some it does contain information

Content

I have created a report with two subject areas (workforce management - person real time and workforce profiles - person profile real time). When I run the report I get data on all employees. But for some employees the fields job, grade and location are empty and for other these fields contain information. For all employees the system has this information on job, grade and location. Please see attached screen shot of the Results of the OTBI report.

I need that information in this report for all of the employees. Any idea what might cause this and how to solve this?