Unable to extract Assignment tax unit information in balance group

Summary:

I am trying to extract a balance group using an HCM extract which contains both assignment and relationship tax unit dimensions. I have been able to extract the relationship tax unit run dimensions, but haven't been able to get any Assignment tax unit run ones. I created a balance group which has both assignment and tax unit run dimensions. I then created a balance usage which has the following matrix items in order:

1. relationship tax unit
2. relationship tax unit year to date
3. relationship tax unit period to date
4. assignment tax unit
5. assignment tax unit year to date
6. assignment tax unit period to date.