I used to be able to AirPlay to the ATV, even if it was in standby. However, since a few weeks ago this is no longer possible. The ATV isn't listed as an AirPlay device when it's in standby. It's only when I wake it up that it becomes visible. It seems that it stopped working around the time that the latest ATV update was released. I'm not totally sure if it was because of the update. Does anyone know what could have caused this, and how to solve it?