I have an Android based TV that is connected for the purposes of iPlayer/NetFlix/other, but is mainly used to play off my local media array via a Pi4 running LibreELEC (Kodi) as even though I subscribe to a couple of streaming services I still find getting things otherwise more convenient. Until a recent update it happily stayed on the HDMI source the Pi is hooked up to unless I switched it, now it (almost) always reverts to its own homepage (with the auto-playing video adverts for shows/games/services) when waking from standby.