I have seen this happening ever since I started my Tidal service. I am assuming, and this is just a guess, that initially Tidal did not get the rights to list the music available. Someone found out and made them delete this song from the playlist.
Same things happen with Spotify and others.
"This means the content is no longer available. This can happen if licencing agreements with the artist/labels, or ownership of rights, has changed. Hopefully it will reappear soon."
https://support.spotify.com/us/artic...r/?ref=related