When you go to "Recover Playlists" in a browser, you are supposed to be able to recover deleted playlists from any time, but I have multiple playlists that are missing in that list and the have not been recovered, either. I'm not sure how they got completely removed because from my understanding, that isn't possible. I'm not sure if there has been an update or something where they now completely delete after a certain period of time, but if that's the case I was never notified of the update or anything of the sort.
(iOS 10, Android Oreo, Windows 10,etc.)
My Question or Issue