I had my Apple TV activating every time I restarted HA so it may be the same problem.
I added this to my configuration.yaml and the problem went away. Hope it helps.
thanks for your reply man! This shouldn’t have any effect I think because I have discovery disabled, but will try to enable it again and add the ignore line. Thanks!
I had a similar issue but it looks like HA is not the culprit here. There have been numerous reports of AppleTV turning on by itself after tvOS10.2 update. People have had different levels of success with solutions ranging from disconnecting a NAS drive/ server from the same network that AppleTV is on to simply killing all background apps/ restarting the AppleTV.
I have the same issue and unfortunately, none of the solutions have helped me for a long term. Once restarted and placed in sleep mode, AppleTV remains in sleep until one day it suddenly decides to wake up randomly.