After downloading 9.3.0 build 4170-30, when listening to TuneIn, after selecting Turn display off, display turns itself back on after a few seconds. TV shut-off after download.
Problem is TuneIn specific. Display remains off when using AccuRadio
Try doing an update check (Settings > System > System update). After receiving 9.3 today I did another update check and it then updated a bunch of my channel apps. Including TuneIn.
Thank you for your response - which I just saw now. Have updated since - the last June 23 to build 4182-30.