I have a new LG OLED TV that has apps like Netflix, Amazon Prime and Hulu that I want to use to watch series available in 4K HDR (c'mon Apple!). To get audio from the apps I have the TV connected to my Marantz receiver via HDMI (ARC) so whenever I open an app like Netflix the audio switches on my receiver to TV Audio. It works great. However, upon exiting the app my receiver immediately goes to the input for Apple TV and not back to my cable TV input. I've tried turning OFF Home Theater Control in Apple TV settings, but that does not solve the issue. I know this is complicated, but is this a problem with my Apple TV or with my Marantz receiver?