'Device' function on TV stopped working

Not really a Serviio issue; however on UN60ES7150 using remote's button 'Device' to change inputs (including to Serviio) has stopped working. Must now go into SmartHub/Source to change inputs (including to Serviio).
This means, user must wait till the SmartHub software starts up each time TV is turned on & it seems to update every couple days.
It does not seem to be the remote button at "TV" on remote still lights up when 'Device' is pressed.
Any ideas?
This means, user must wait till the SmartHub software starts up each time TV is turned on & it seems to update every couple days.
It does not seem to be the remote button at "TV" on remote still lights up when 'Device' is pressed.
Any ideas?