There appears to be a bug in the Client software with regard to the visibility of the groups.
I just updated the server and client this morning, and I’m finding that while I immediately created 3 different groups and added printers (based on locations of the printers), the groups don’t appear in my client software after the client is closed and re-opened. The groups don’t show up in the Group column of the printers tab, and the group filter dropdown doesn’t show any of the groups I created. if I click the “Manage Groups” button at the top right of the window, the groups show up, and once I click the back arrow to go back to the printers tab, the groups show up correctly.
This behavior appears to be 100% repeatable if I close the client and re-open it.
If I follow the process above (click the Manage Groups button and back out), and then sign out of the farm client account, I can sign back in with the same credentials or even my admin credentials and the groups appear correctly. So only closing/quitting the client software seems to cause the groups to vanish.