Playlists ruined? (SoundCloud tracks not playing from playlists after "partial outage")

Hi there, 

Concerned I may have to rebuild my playlists in Sonos, comprised mostly of tracks from SoundCloud. Recreating them by adding a track at a time, when there are probably 1000+ different tracks up to now does not sound ideal. 

After the "partial outage" of SoundCloud last week, no tracks on any playlists from this particular source would play/ will play.

Tried many times to load different playlists with different tracks to different speakers on my system (have 3 different speakers)...none of them worked. This same behavior has happened both during the outage, and after the Sonos status page said the service was restored.

I tried reauthorizing my SoundCloud account multiple times, both during the outage, and after Sonos claimed service was restored...no tracks from SoundCloud would play from my playlists. Got desperate and tried removing/re-adding the SoundCloud account to my Sonos services, but still nothing plays. Fear this last action may have nuked the playlists. But good news is, when I add a fresh track from SoundCloud to just play, or add to a Playlist, I at least get music.

Is there anything I can do to restore these playlists, short of re-adding each track one by one (and deleting the old, non-working duplicate)?

Help!