This feature seems to be broken, not sure when it started but it is in 4.0.2 and 4.0.3.

I noticed whilst changing my Display Titles options in all playlists my "Year and month" playlist was empty. I created a new one but the same, empty. I then deleted the month level and the playlist appears by date (obviously just by year). I then add back the month, click off and back on the list and its empty, years disappear and the list is blank.


Mezzmo example.jpg