To me it makes sense it would not ring.
But then I would be revealing what I know about folks demands for long battery times. To reach this low power state, WiFi and the CPU may be off. That's that 2 minute time you are reading about.
Sorry but I don't consider this a bug but a poor explanation from Apple about how things work, the tradeoffs of feature for longer battery times.
Consumers however are not interested in such a discussion and may flame anyone that would discuss it.