apple keeps changing my custom artist name

i listen to an artist named ethel cain. in the past, shes released music under the names "white silas", "atlas", and also has collaborative eps out under "white silas & little triste". to organize my library, i set all songs to be under the name ethel cain. my phone cannot go 6 hours without changing all the songs back to white silas or white silas & little triste. even the songs that she released on itunes as ethel cain get set to be as white silas. sometimes the album artist will change but the individual songs will still be ethel cain. sometimes the album artist will change to white silas & little triste but all the songs will just change to white silas. either way, they are no longer reading ethel cain. its very annoying. how do i make this stop?