I have subscription of Apple Music, until few days I am not able few songs although they are available on Apple Music I get a message saying item not available
iPhone 6, iOS 9.0.1
In Apple’s own playlist, Alia Bhatt Essentials, that songs is also listed, but not available.
It is possible that the artist/record company/rights holders have recently chosen to retract selected songs temporarily or permanently from Apple Music, but not from the iTunes Store.