So now that Prince's catalog has made its glorious return to Spotify, would it be possible to inquire from Warner or his heirs or whomever is doing the negotiating about tracks performed by others, but written by Prince?
These started to vanish in apparent surgical strikes fairly recently, like after Prince's death. Most conspicuous among these are songs by artists very closely associated with Prince, such as Chaka Khan ("I Feel for You") and Sheila E. ("The Glamorous Life," "A Love Bizarre"). Curiously, a few Prince-penned songs, such as Bangles "Manic Monday" and Sheena Easton "Sugar Walls" never did disappear.
Would it be possible to inquire about the Chaka Khan and Sheila E. songs? Since those were Warner releases, one would think they would be covered by the agreement, especially since they were removed much later than Prince's own catalog and I think they actually were made available after his death.