I have three BOND Z type devices and when I try to update this firmware 2.12.3 it gets to 10% then fails with error 107 communications error. I have rebooted the hubs and still no luck on any of the devices.
As a counterpoint, my ZZ and BD Bridges both updated via Android app to 2.12.3-beta just fine right now, but I had already updated them both to 2.12.3-hfhddghbgg (or whatever it was) earlier today.