Maybe IMDb just hasn't updated the information yet.
Clearly they're in post-production by now. Didn't you say, Joan, that the OKOT production company has kept everyone in the dark as to some actors' roles with past projects? Could be that they're just up to their old tricks here. Also, I believe the score is usually one of the last things to be done on a movie, so it doesn't surprise me that a composer isn't listed.
In other words, I'm not going to start worrying quite yet.