Hi,
Babies are clever! If they are finding the letdown to forceful or the milk supply to abundant they will utilise their “milk management system” - they will release suction so as to slow the flow of milk. This will produce a click, but rather than being a problem it’s his way of dealing with the problem. If he comes off coughing and spluttering, give him a minute then put him down when the flow has ebbed.
Is he having both breasts at a feed now? He might be getting to an age where he is looking for that. What have his weight gains been like? This will reveal the secret of whether or not he is getting enough. Some times too much milk causes irritability - and then mums think it’s that they are not getting enough milk. Is he sleeping for any longer period? If they are sleeping longer (at night hopefully) they will need extra feeds in the day - I don’t stray from my waterbottle for more than an hour- especially in this hot weather. Frequent feeds could be pretty normal. What have his wet and dirty nappies been like?