Embargo - User Selectable group?

hi all, glad to be here! First, we’re on an older version of HIPPO CMS, HIPPO 10, we are working to upgrade at least to the most recent version of HIPPO 10. That said…

I am having a small issue with the Embargo plugin that I hope someone may know how to configure…

I have 2 new embargo groups set up with proper permissions, and when a member who belongs to both groups (aspender) sets embargo on a document, it’s embargoed to both groups to which he belongs. I read in the documentation the UI is supposed to present the user with an option to select which embargo group he or she would like to apply. Any ideas as to what may cause the pop-up not to show, and to have it automatically set the embargo to both groups instead of just one user-selected group?