Cannot drag a contact into a group in the Contacts app
Running OS X 10.15.5 Catalina. Ever since the Catalina upgrade, I've had problems adding contacts to groups. None of my groups are smart groups, and the drag & drop functionality from prior OS X releases is often -- not always -- failing.
Workaround is to quit Contacts, then restart the Contacts app while holding down the shift key. Then the drag & drop function works again.
MacBook