Previously when I double clicked an album in this mode, it queued the album last as intended.

Now it just opens a new window with just this album. Worse, double clicking that album opens yet another window with the album displayed in a different style. (at which point double clicking finally queues it)

In the Preferences -> Now Playing -> action when double click is still set at Queue Last.
What other setting do I need to change to get the old back?