Input name in red

[MosesMagnum]

Hi,

I've recently made a couple of changes to my setup and noticed when I'm switching to the main toslink input (CD) the input name is in red. Once the I turn the CD player on I get a pop out of the right speaker and the input name flashes in red until I press play, at which point it stops flashing and turns white.

Anyone have any idea what would be causing this?

Thanks in advance