We sort of have the same problem, at 10 months my little girl is waking up usually 3 sometimes 4 times a night. Quite often it's 3 times a night that she actis like and doesn't go back down till she's fed a bit.
That to me, and our pediatrician says 'hungry.'
This occurs even now with our new bedtime routing which is bath, book, breast....
So, she is feeding, and theoretically filling up right at bedtime. Our pediatrician wants us to try other, small, quiet things before feeding: swaddling, holding for comfort, .... and to be looking hard at where she's sleeping to ensure it's not causing these wake ups.
With weaning, your still breastfeeding or bottle feeding mother's milk, and best thing I can think of with what I've been told and seen. Ensure your little one is full, their nighttime routine is consistent and helps to settle them down, and finally that their bedding area is free from things to wake them up, and if they are spitting up at night or having bowel movements at night, then yes their stomach is going to be empty and it may take awhile to get that rhythm to happen during the day.