Short answer is, yes, her dialogue interactions in Act 3 have been bugged since patch 3 dropped. They show dialogue options that are completely irrelevant to the situation. This was not fixed in patch 4.
And also yes, it sounds like her Act 3 romance scene has been pretty heavily bugged for you. It’s not normal to be that deep into Act 3 and have her making comments about sand in her hair without the actual scene happening. I don’t think this is connected to the dialogue bug, though.
Not sure why you’re missing the romance cutscene. I know that some folks have missed it, but I never have. Did you ask her in act 1 or 2 about herself as a person and she revealed that she likes night orchids and can’t swim? I think her act 3 romance cutscene weirdly might be locked behind getting that response from her.
