Email contact groups not working

Mail won't allow entry of a contact group as a recipient in TO, CC or BC since upgrading to Monterey. When I type in the contact group the name of the group appears in a drop down list but when selected only the group name appears on the recipient line. If I send the e-mail after selecting the group name no one on the list receives the email. Previously there was an option to expand the group and see the recipient list - not so now. Pressing + and going to Contacts won't let me select the group either.

I lost the ability to use smart groups in Contacts with Catalina but could still use groups. Has the ability for Mail to use any type of group in Contacts been eliminated? If not, does anyone know how to correct this behavior?