I am in act 3

After the completion of Shadowheart romance arc and I tried breaking up with her. I get the sad and upset reaction from her and an acknowledgement of our new relationship status when I engage her in a new conversation, but then it defaults back to the same dialogue options as when we I was romancing her, where I can again choose to kiss her or try to break up with her again.

I am getting a bit of crazy girlfriend vibes eek