iTunes now displaying artists in incorrect order

[toypadlock]

Just updated to the latest version of iTunes and now my artists are displaying out of order on the sidebar. Really weird:

I haven't done anything with the SORT field, and when I look at them in the album view, they sort in the right order. Any ideas?

 

[chrismac2]

Number of people seeing same thing:
https://forums.macrumors.com/threads/itunes-12-artists-view-out-of-order.1896817/