Segmentation: Blank # Assigned

Good Morning,

We are new users running v16.  I've created a segmentation with a number of suppression sets and target sets.  The # Qualified is populating for them all but the # Assigned remains blank.  Our other segmentations are working as expected.

Has anyone experienced this before?  Our onboarding team is looking into this but we are on a deadline so I'm hoping someone may have a suggestion.

Thanks so much,

Melissa