Thanks for the reply.They probably did eat them, this happens with newer pairs, or fish that are spooked. Limit commotion in and near the tank, and try some sort of night light for at night. Something as simple as a lamp near the tank works well.
BTW, congrats on the parent raisers, I've been trying for a couple of years to get pairs to pull this off. Often angels that were parent raised end up being parent raisers.