I too felt the same when I look it now. But I think he will walk towards her and when reaches infront of her will start badmouthing. I am just not understanding Aliyas position though. When Ranbir is walking she seems to be beside Prachi but later when Ranbir finishes his talk and she starts to give lecture, her position is different.I guess there in more to it than what the preview shows.But have zero expectations from Ranbir. He is always dumb in these situations.
But when he walked towards her he stopped far from her and stood there to talk bad about her and wasn’t shown walking any further closer to her from where he was already stood and not just ranbir but also aliya’s position changed from when she responded to ranbir’s speech to when ranbir was stood next to prachi as Aliya told her to leave. Like you said there’s more to the eye. Some more things happened between those two things that ranbir changed from standing far opposite prachi to right next to her.