Airplay not working in iTunes 12.9.1.4
Just updated to latest version of iTunes (12.9.1.4) and now have lost the ability to play from laptop to our Sky Q boxes.
My iphone can still cast to Sky ok, but in tunes on the laptop the airplay icon shows when you first start itunes but has no selectable options. As soon as you start playing a music track the airplay icon completely disappears.
Is this a bug in the latest version?
null-OTHER, Windows 10, iTunes 12.9.1.4