your comments are greatly appreciated. I tried that for a small 17 song Led Zeppelin playlist. I executed what you suggested from the last song and worked my way up to the first song. When not on shuffle mode the up next queue shows all the songs.
But the instant I hit shuffle the queue goes blank. It will play the current song to completion and then terminate.
Incidentally, the repeat or repeat 1 icon was not engaged on any of the 17 songs on this playlist.
Still at a loss. Bizarre.