It happens in Tidal as well.
From Qobuz
" The album you are talking about was available and for several possible reasons it was removed from the supplier's catalog.
The reasons can be different:
- This product is no longer available from this supplier (change of label, etc...)
- The supplier, the artist : the rights holders have decided not to give us the rights anymore
Etc... "
That's why I enjoy having my CD's and LP's on hand. An artist or product supplier can remove their music from a streaming service anytime., after all they own the rights to the music, not Tidal or Qobuz.
There are 3 music rights:
Master rights are typically owned by the artist or record labels such as Universal Music Group, Warner Music Group, Sony Music, Believe etc.
Publishing rights
The publishing rights are the rights to the song itself, including the melody, lyrics, and arrangement. Publishing rights are typically owned by the songwriter or composer.
Performance rights
The performance rights are the rights to perform a song publicly. This license is required when your streaming service offers a live stream or when users can listen to music on demand.
And in some of these agreements , The music can only be streamed for a certain period of time ( as noted in the term of agreement)