Mine did it once, but she stopped feeding cause it was like a sneeze, had milk come out of both mouth and nose, and I assumed it was reflux. She hasn't done it again; she's 5 months xx
My first used to do that but only on one breast. It was because I had such a strong let-down on this side. It stopped once he got older and became more used to it x
Mine did that yesterday as a one off because she's congested at the mo