Yes, I have seen this quite a few times. My sister in law had a very, very skittish little white kitty, and you never even knew she had a cat, because you never saw her. But at night, she would come out, meow, walk up to you, allow you to pet her. It was the strangest thing. I also had a little kitty who was likely a feral, he was a wild man! We took him because we knew no one else would ever adopt him. Took him home, opened the box, and he ran out, hid behind the fridge and refused to come out. But that same night, while we were sleeping, he creeped out, jumped on the bed and slept right next to me. The moment that I opened my eyes and he saw me, back behind the fridge he ran. He did this for weeks. He never did warm up to most people and was skittish his whole life, but he did this same thing you are describing, he came to life at night.
I would jsut give her time. There is not much else you can do. You can try to win her affections with food, or a treat that you know she can't resist. That can help a lot. But the best thing you can do is to have a nice, calm environment for a cat like this. Don't let people be loud and make lots of noise in the house, and if you have kids, this cat will probably be terrified of them, so I'd make sure they do not try to find her, that will be a nightmare. I think you should not try to hard to get this cat to come to you. The best way to win her over, is to give her space, keep it calm, and let her come to you. And she will, if you don't try to push yourself on her. Let it be on her terms.
Good luck, she will come around.