Might be a growth spurt. Just feed as per his demands. Babies know to stop when they're done. That aside, it's good to gain weight now ,it'll taper off as he gets older.
My baby used to always drink more than the average amount and she’ll be hungry 1.5-2 hours for BM.. so she’s heavier percentile but all good
Same with my baby boy currently 2mths but drinks 150ml every 3 hours. Just have to go with their demand. If not they cant rest well too.
could b growth spurt... sometimes i dont understand y suddenly so much or suddenly so little
as long as shes drinking and passmotion and have proper sleep should be fine