Apple Music Shuffle, 'Shuffling' off to other artists when I think it should be Shuffling one artist.

What happened with Apple Music Shuffle?

While listening to Nirvana (and other artists too) Music suddenly 'Shuffled' to JS Bach (ie: stopped Shuffling the Artist I selected). Um, points for style, but not at all what I was thinking Shuffle would do.

Basically it seems that Shuffle in an Artist is broken. The Shuffle icon is red, and nothing I do will turn it off, and apparently nothing will stop Music from grabbing another Artist collection. I even turned Shuffle off in the Control menu, and it STILL grabbed a different Artist. It seems that when Shuffle is turned on or off, when an Album is done, it grabs a different artist completely, even though there are other albums in that Artist available, and just starts playing that different Artist.

I'm rather disappointed and unimpressed with the apparent lack of control over Shuffle now. Prior to what was apparently an update, the Shuffle icon in an Artist kept the Artist tracks in the Shuffle play consistently, and it seems to have stopped working.

What happened, and what do I do to get the 'old way' back?

Thanks...