Hi Ezz, maybe your little guy is just hungry? Maybe your milk is not as good as it was? Maybe he's not getting enough each feed? Not too sure just an idea. My little guy is bottlefed so im sorry i can't say more bout b/feed bubs.
My bub is nearly 7 months old and has his 1st feed around 7.30, then 5 more through out the day last being around 9pm and 1-2 tsp of solids. i am only giving my bub 180ml instead of the recommended 240ml (i find he vomits more on the larger bottles due to reflux). And my bub is too nearly 10kg!
have you considered a bottle just before bed? maybe it will keep him fuller for longer.
good luck with your feeding
take care