I'm not sure if this is a bug or intended functionality but I'm posting it anyway.
Steps:
1) Select class: https://i.imgur.com/R2CMy48.png
2) Select subclass: https://i.imgur.com/SWaMZ6R.png
3) Hit previous. I would expect the text here to be class text but it still shows subclass text: https://i.imgur.com/MPflDH6.png