Since I've installed the portal it randomly switches itself on in a way that triggers CEC on the TV.
You could be watching a program and it switches, or even early in the morning it decides to wake the TV up.
I've removed the CEC, but that's for the whole TV and that reduces the functionality of the TV. This is not a fix it's a cover up. As I happen to like CEC for my other devices and even for Portal, as I don't have to select the HDMI port for service. E.g. when switching on the 4k player the TV used to switch on and I could then watch a film without reference to the HDMI port. I've lost that functionality. It would be great if you could fix it so that it doesn't switch the CEC into action until you get to the underlying problem of it randomly switching on.