Hi,
In the second picture below where it says Legend in that box, that won't appear when you export. Once you export or print the map series nothing will appear on that page. Any element that doesn't have data in it will show you a label like that. It's designed to show you the element still exists but has no data.
I think if you export or print your map series you'll get the result you are looking for!
Cheers,
Aubri
Cheers,
Aubri