Expert Pro Turns On Unexpectedly

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Strangely, this has just started happening in my system as of yesterday evening and is very annoying. My amps are being woken up every 10-15 minutes, whether they were put to sleep by a medium or long press on the front panel button, or by the remote control. It's definitely to do with Apple TV: it occurs when the Apple TV is running or when it has been "powered off" by its remote control, but does not happen when I disconnect mains power from it. As far as I can tell the Apple TV did not take a software update yesterday so I have no idea why it's suddenly started doing this. There are no other recent changes to my network.

At the moment I don't have a reasonable work-around that doesn't involve completely removing mains power from either the Devialets or the Apple TV, both of which are quite inconvenient.

I'm happy to do some more experiments if anyone would like to suggest them.

Happy Christmas, everyone!