Dotted cloud on Mac, greyed out songs on iPhone and iPad which won't play.
I uploaded some music from CDs onto my iTunes account. On my Mac some of them show up with a dotted cloud next to it but it will play the song. On my iPhones and iPads it will not play those songs or allow me to download them to the devices as they are greyed out. It seems to be random on which songs that happens to. How can I fix it?