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I can see it on my WiFi network,I’m not constantly checking the app, which would obviously make it up. And I can hear it whirring a bit when it is awake.
It's a very real problem, so stick with it. I've got Tesla engineer coming out tomorrow and I'll be asking him about this. Also I'll know how much my car has lost since Friday. I haven't touched it so will be interesting to see the result.