At the second miraculous feeding, why didn’t the disciples remember the first feeding?

During those days another large crowd gathered. Since they had nothing to eat, Jesus called his disciples to him and said, “I have compassion for these people; they have already been with me three days and have nothing to eat. If I send them home hungry, they will collapse on the way, because some of them have come a long distance.”

His disciples answered, “But where in this remote place can anyone get enough bread to feed them?” Mark 8:1-4

            The incident occurred in the Region of Dalmanutha, where archaeologists are unsure of its precise location, but know it was in Gentile (non-Jewish) territory.  It could be also be known as Magdala, where Mary Magdalene was from.

            The first feeding of the 5,000 included Jews, which the disciples would immediately think deserved a miracle and food.  The second feeding was to non-Jews, which the disciples would immediately think didn’t deserve a miracle and food.  The prejudice was that deep that they would have rejected Jesus’ compassion for them and not believe Jesus would have repeated the first miracle for them.