My #1 most listened song keeps disappearing from my Replay 2026 playlist. It is there sometimes, but 90% of the time it is completely absent from the playlist, leaving only the #2 and below songs. None of the other songs have had this issue, and the problematic track is still in my Apple Music library, and I have purchased it from iTunes as well (for my iPods).
(this issue happens across devices, not just the one I tagged, and occurred BEFORE I updated to iOS 27)