Does anyone know why some of Stella's Jangs music have been removed off Spotify?

Today I noticed how Stella Jang's albums Colors, Vanishing Paycheck, and I-Stella have been greyed out on my playlist and I can't play them. I slightly checked her socials to see if she has said anything but she hasn’t said anything. So if anyone knows can you please tell me because I really liked her music but I can only play some of her songs.