I use a Harmony remote, so can't turn off my ATV (4th gen) with it, but that's a different story! It does however mean that my Apple TV has a sleep timer on it (15 minutes). When I Airplay music to the Apple TV OS 11.2, it doesn't appear to be stopping the sleep timer. So if I start Airplay music, and skip tracks etc, the system goes to sleep 15 minutes later regardless. I'm sure this didn't used to be the case? Is this is a bug in 11.2, or is this expected behaviour?!