8 month old bedtime

[mrsmoomoopoopoo]

8 month old dd is ebf and a bottle refuser.
She goes to bed at 6.30 and every night without fail she wakes about 30 mins after she's fallen asleep crying and the only thing that will settle her is feeding her.
How can she be hungry when she is fed just before she goes to sleep?

I have tried sending DH into settle her but she just gets even more upset and then I end up going in and feeding her.

She has dinner at 5.30 bath at 6 milk and bed at 6.30.

This situation doesn't bother me I'm just curious why she does it.
I'm supposed to be having my first night out next week but can't as when she wakes I need to be there to feed her as she won't take a bottle.

Any thoughts anyone?

My DS2 does this, I think it's comfort rather than hunger. Like he's checking that I'm there
He is also a bottle refuser. I've only been out a couple of times since having him but DP normally pushes him back and forth in the pushchair and he sleeps downstairs till I get back. He finds it easier to settle him in a totally different way so DS2 doesn't expect me. Every now and then I don't think it hurts. I always feed DS2 before I go out so he's definitely not hungry.