Hi there, it really depends. Having any kind of expectations for LO sleep is kind of an exercise in futility ;-) They don't follow the rules. Not every LO is going to knock off 12 hour nights, I think Finn has done it like twice in his entire 14 mths and he was ill. He's also only done 11 a handful of times, he has been mainly a 10-10.5 hour/night sleeper, and we have tweaked like bandits to maximize his sleep.
The feed weans because physiologically they become capable of sleeping much like adults, taking food during the day and doing their long stretch at night without food. Now your LO is still in that period where hunger could be legitimate, it could be growth spurt, it could be that he didn't get enough in the day or that he's just not ready to do it.
At Finn's EW he often would go back to sleep, and often after a small diluted bottle. So not much at all. But it didn't necessarily mean he was hungry. It could be thirst, it could be comfort, it really could be habit.
Could you post your routine, his A times are pretty high so let's have a look.