This will throw you out of any group you are in. There is usually no need to clear the cache.
Support for Apple Music is currently in beta, which means that it is unstable and might not always work correctly. During the beta phase, this option is free to use for a limited time.
Every Apple Music account is linked to the country (aka. storefront) it was created. Set the correct storefront/country in which your Apple Music account was created, to make sure we can show you the correct songs.
