No. All you do is factory reset the devices. Then put your Hubitat and each S31 Lite into zigbee pairing mode. They will pair back with their original device-ids and names.
All the symptoms you describe for device A and B occur when mesh networks are weak or interfered with. The association with a particular platform version is purely coincidental.
I would recommend taking @Ken_Fraleigh's advice in your original post about this issue. Or adding a few other well-behaved zigbee repeaters/routers.
