Version: Spotify for macOS (Apple Silicon) 220.127.116.119.gc253025e, Spotify for iPhone 18.104.22.1689, unsure of Windows Desktop version
Device: Macbook Air 2020, iPhone 12 Pro, Windows Desktop
Operating System: macOS Big Sur 11.6, iPhone 14.8.1, Windows 10
Issue: First noticed behavior Sunday 11/14/21. Playlists across devices are losing edits and seem to be reverting back to old versions of the playlist. On Sunday morning 11/14/21 I noticed several songs I thought I'd added on Friday to an existing playlist weren't there anymore. I edited this pre-existing playlist on my Mac for a class Sunday morning, taught the class using my Mac, but later that day the playlist reverted back to what appears to be a cached version of it in a previous state. It removed some songs I'd added, added some songs back that I'd removed, and reordered them. I uninstalled Spotify / reinstalled, ensured I wasn't missing any updates, logged out and back in, still had the issue with that playlist.
I created a brand new playlist for Monday, was able to create everything fine on Mac and Add to my Profile. When I got to the studio to teach I used the studio's Windows Desktop version to access the studio Spotify account like normal, and my playlist did show on my profile, but again, it was a random older version of it and didn't have any of the changes I could still see present on my Mac (which I had with me). I rebuilt my playlist on the studio's account / Windows Desktop, and taught class. After class, I uninstalled and reinstalled the Windows Desktop version, but I still only saw the older version of my original playlist on my profile - and now, the playlist I had created on the fly at the studio, and just taught with, only had one song in it. I then checked my Mac wondering if the original Monday playlist was still okay there, and unfortunately I see there now too the Monday playlist is the old version I was seeing from the Windows Desktop version on the studio's account.
It seems the revert happens when you close the app, like it's not saving the edits from your session.