I would like to be able to wake up the TV from standby when I attempt to cast something to it, but this only works for a period of time after it has been switched off.  Once this period has elapsed the TV is unavailable for casting and has to be switched on manually before the functionality is available.

I'm assuming that the Chromecast functionality is switched off by the TV after a period of time to save power, although I can wake the TV using the remote app so network functionality must be present.

Does anybody else suffer from this same issue or have a solution?