I have an MS220-8P on Firmware 9.37. It shows everything is disconnected, in the dashboard, but things are still working. If I click on a port I can see that CDP/LLDP pull device details, show connected clients, and even shows bandwidth usage.
The network topology goes: ISP Equipment > Meraki MX64 > MS220 on port 1. MS220 port 6 is a local NAS, port 7 is a laptop, port 8 is a WAP.
Currently upgrading to firmware v10.33 to see if that resolves this. If it doesnt, any other things to try?