Audirvana Mac Version 3.5.15 (3545) Bug in Artist Sorting

For some reason “Jethro Tull” is being sorted after “Fiona Apple” and before Argent". Sort artist for each is “Apple, Fiona”,“Jethro Tull” , “Argent”. The first “Jethro Tull” album is “Aqualung”. The same tags work fine in iTunes and on multiple DAPs.