Yes, these buttons are enabled, but they changes to the next list, not to the next folder. I have my music organized like this
So on previous version I was able to do this
My music folder
Long flick on artist folder. On previous version I have button 'play all'
Now seems that I have to clear queue and do this
And now, when I press '>>' player simply exits queue and don't navigate between folders
Upd. Seems that I've understood. I need to go to the lowest level of folder hierarchy and start any song. And after that folder navigation start to work