Hmm... I was just wondering because if you do groundwork the horse turning it’s whole body towards you is a sign of respect and them paying attention to you (they should only do that if there is pressure on the rope). Make sure that there is slack on the lunge so she doesn’t feel like she has to turn either.
Sometimes my horse does this if she is just walking but once she is moving she is usually fine.
Has she gotten any better?
Do you use a whip? If not it would be a great way to get her back to work on her circle, to make her understand that she has to stay on her circle as long as you don't ask her to move towards you.
When she does it, you can start with a vocal order combined to a quick movement of the lunge to make the situation uncomfortable for her, and if she's not responding you can use your whip towards her (without touching her of course), and as soon as she goes back to her place you stop everything and you can congratulate her.