A lot of people have CEC issues with LGs.
Not to say that it’s an LG only issue, because other brands have had similar issues as well, just not as much.
Maybe our community has a higher representation of LG OLEDs than most.
That being said, I had mine all dialed in with no CEC errors.
Since the latest kernel, it’s been a nightmare.
If I try to use a different input, on my TV or my AVR, after about a minute or less everything switches back over to the Vero.
So if my children want to play the Switch or something I have to shut the power down on the Vero.
Then when they are done I can power the Vero back up, but a new issue arises, when I play a video and the Vero switches the resolution, I lose the Vero and my system changes input over to the Switch (which is not even on anymore).
So I have to get my remote and switch everything back to the Vero to watch the video and it stays put.
It’s pretty annoying.
Maybe I’ll figure it out.
But I hate CEC with a passion.
Even if you disable it on all your devices, it still does wacky stuff.
I might just invest in one of those HDMI cables or adapters that strips it physically.
If I figure out a new solution I’ll post it here.
Follow this link to see my old solution: No Hdmi ARC on AV receiver when V4K is hooked - #24 by Kontrarian
Some people found that it worked for them.