remember had the same thing with ds1
start off with a good latch each feed - head tilted back, wait for gape (or gently press on chin), open mouthed latch
but after a moment or two he always pauses and adjusts latch so less of the nipple is in his mouth. i can feel that it is less of a 'deep' latch iykwim
i wonder if i have such a fast let-down that it is difficult/unpleasant for him with a good latch?
ds1 was a very fast feeder - after a while we were down to literally 2 or 3 mins per breast
i guess it doesn't really matter - ds2 gaining weight well (up from 25th centile at birth to 91st at 6 weeks) and i'm not in pain - but it's strange, isn't it?