Workspace Warning - No Country associated to contact record

Summary:

We would like to have a workspace warning message when a contact does not have a country. I have created a rule based on Contact.Country is NULL to display a message however this is not working as expected. I had assumed that the country field in the contact.addr would be linked to the contact.country field.

Content (required):

Editor loads

contact.country is null

display a message box

Version (include the version you are using, if applicable):

22C

Code Snippet (add any code snippets that support your topic, if applicable):