I have the same issue, with my soundbar, but this has nothing to do with the sound bar. The same issue is with other soundbars. It’s the issue with the TV CEC/ARC. It’s not that smart and it thinks that bar should be on TV/ARC and it switches it. There is no fix or solution for it, Samsung, LG and others won’t fix it so stop asking. The only way to fix it is to use tv as a switch but you can’t get Atmos to pass because your TV does not support it. Atmos requires eARC, its coming next year, they want you to be frustrated until you get a new TV and they get their money$$$. They can easily fix it with a function that locks input or remembers input and ignores TV.... but they won’t because it cost extra to have someone code this into the bar... needs to be tested $$$. Stop searching there is no fix.
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