What is causing the Automatic Shut off?

New Roamio Pro owner here, trying to get used to the smaller remote. I must be hitting something on the remote that is making my TV shut off, but I can't figure out what it is. Suddenly I see on the TV a message "Shutting off in 3 minutes" and a count down, then at the end the TV shuts off. I can't figure out how to disable it (and I don't know what I hit to activate it)!



Anyone have any ideas? I have a Panasonic TV.