My first hunch is that this is the new fs_deleted flag. The tables select() before the library scanner has marked the tracks as not fs_deleted, so they are blank. Another part of this bug is that the first crates and playlists are blank until you re-click on them in the sidebar (causing another select()). The AutoDJ pane doesn't re-select when you click on it so that is why it is staying blank.
My first hunch is that this is the new fs_deleted flag. The tables select() before the library scanner has marked the tracks as not fs_deleted, so they are blank. Another part of this bug is that the first crates and playlists are blank until you re-click on them in the sidebar (causing another select()). The AutoDJ pane doesn't re-select when you click on it so that is why it is staying blank.