I have a Sony TV and Google Home and everything seems to be hooked up and working except when I tell the Google Home to turn the tv on it seems to work and comes up with the Home Assistant logo; however when I tell it to turn the tv off it says it will turn the tv off however it goes to the main menu of the tv and remains on. Not sure if this is a google home issue or a media player issue but I can seem to figure it out. I have two Sony TVs and it does this on both.
Are you able to kill the tv from within Home Assistant? Perhaps theres a setting in the TV firmware that handles powering the unit on and off? Just brainstorming.