MultiDeviceSetupClient::Observer::OnHostStatusChanged() does not notify observers in the event of a Cryptauth sync. This means that if a client uses MultiDeviceSetup as the primary way to retrieve a host device object, and the laptop is left open for ~28 days, that host device object will have stale BeaconSeeds. This will prevent BLE communication with that device.

This is an edge-case (requires leaving the laptop logged in and on for ~28 days), so it's not too high priority, AFAICT.