Anna - A difficult one for me to get a fix on - except that dreams do not stick to the rules for physical life. The child is cremated and all that can survive does. The mask is probably used to put a face to what is now ashes.
Then the dream plays the funeral again, probably showing your inner feelings about the death of a child (is it related to you?) Some sort of chicanery is practiced, or it seems to be because you are left uncertain.
Tony