> from the new style Now Playing panel
What's the 'new style' now playing panel?
> it plays the artist shuffled, however if you do it from the main panel or the player and it plays the artist by albums
That's the same behaviour as 'play more -> play similar -> [artist]'.
Personally, I would prefer this option to play grouped by album by default, because you can easily shuffle it.
But if it starts off shuffled, it's not so easy to re-group the tracks into albums, if that's what you wanted.
I agree that there should either be some logic to the behaviour being different, or some consistency between the panels.
As an additional bug in relation to this feature, if you:
'right-click the MAIN now playing list (in 'track detail' view) -> play more...'
the menu contains a duplicate entry for 'play artist'.