Are they using current group tool that is implemented in wrath or retail one?
Updating that feature is mentioned as a feature for Cata Classic on the main page but I don’t believe whatever updates it’s getting are available in beta currently (though the servers are down so we may be getting a patch soon with who knows what in it).
It’s listed in the sticky at the top as something that is still a work in progress:
Continuing the discussion from Cataclysm Classic Development Notes and Known Issues – Updated April 8: