Baby can't breathe normally during breastfeeding
I'm not too sure about this one. Is your breast covering his nose? That would be my first guess. If not, is he a new newborn? Babies are still learning out to use all of their parts. Charlie had a bit of a time in the beginning, learning how to breathe outside the womb, learning how to use a nipple and breathe at the same time.. it can be a challenge to a baby. See your physician with questions.
Otherwise I agree that it takes a while for babies to learn how to coordinate breathing and sucking, LOL.