Playlist secret_token not authenticating playlist tracks - getting 404 error.

This has worked for as long as long as I've been using the SC API. You could play a private track in a playlist with that playlists' secret_token. As of last week, this stopped working. I've been waiting for this to be resolved (as recent secret_token bugs have been), but nothings changed in days.

Sample code:



Getting this error:



Will this be the continued behavior? Or is it a bug?

Thanks.