Hierarchy in matrix visual: blank rows

Hi everyone!

I have a hierarchical tree of departments and i would like the show the processes_id in each unit like that using the matrix visual.

The strings in the format xxx-yyyy are the processes id that are in each unit. It's working amost well except the blanks rows 😞 I would like to know if there is way not showing the blank rows. The option 'Show items with no data' is unchecked. In 'rows' i put the four levels and the process_id. The pbix file is here! 

Thanks for any help!