While watching tv it keep going back to the apple screen on its own
Why does my tv keep going back to apple screen while I’m watching it. It does it on its own.
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It seems that the CEC signals between HDMI devices react in unwanted ways. This would be specific to your setup and the exact equipment used. CEC implementations vary between brands and models and years.
It seems that your TV sends a CEC signal to wake connected devices, and/or switch to one of those devices for input. The connected devices have no influence over that (beyond the CEC on|off setting).
You could turn off CEC on all devices, at the cost of losing CEC functionality that you may find convenient.
You could turn off CEC on some devices, and see if one reacts to another but not vice versa in a manner that is agreeable.
Consumer Electronics Control (CEC) - Wikipedia
Control your TV or receiver with your Apple TV Remote - Apple Support