the director window (Alt+B) only shows the song title if the song is not playing yet. As soon as you hit play the song title disappears.
This is logical since the song name has to be replaced by the marker labels.
however, even if no labels are defined the song title is removed from the director when you hit play.

suggestions :
option 1 : if there are no markers in the song, keep displaying the song name
option 2 : reserve a part of the director window for the song name so the song name gets its own fixed area in the director window and is always visible (most logical place would be just above the visual metronome i think)
> my current workaround is to create a marker with the song name (at the beginning of the song)

another nice improvement would be to add the currently playing pattern to the director (might be a bit more complicated since you can have several patterns playing at the same time ...)