@Anonymous wrote:@atc9809 Irrelevant.
No, it's not. The OP has a Sony TV, but you claim it's a problem with Samsung TVs. I don't have any Sony TVs, but I've had a Roku connected to different Samsung TVs for over 10 years and never encountered this issue. The oldest TV is now ten years old, while the newest one is less than 6 months. Completely relevant. And if there was such an issue with other TV brands, my experience with LG and Vizio would indicate otherwise.
My newest Samsung TV has an option when I press the Input button to configure Universal Remote Settings, but I have never configured or used that function. CEC has not done so automatically.
CEC turns off 5 devices with one button press, and switches inputs depending on the remote used, so I think I'll keep it on. I've had problems in the distant past and have had to unplug cables, power down, and reconnect to have devices discovered again to get it working, and that's how I know that the universal remote will also remap buttons when the Roku is discovered. But CEC problems were resolved long ago, basically back to the day an hdmi switch failed and was removed from the chain. But thanks for the suggestion anyway.
Roku has nothing to do with, nor can it control, what the TV manufacturer has programmed the TV to do in response to a press of a key on the TV's own remote. This is a TV function and you need to take your concern to the TV's manufacturer.