For one of the wealthiest companies in the world they should have a flawless music app. They do not. Regularly I'm sitting next to my router and modem, good signal, yet it takes forever for the app and songs to load. The UI regularly bugs out. Similar, if not identical albums get regularly swapped out making Playlist unreliable for long. In some cases, due to what songs are on your devices, or regular album swap outs and renews, you can get duplicate songs requiring constant library maintenance