Pant dismissal wasn't really too much controversial. There was clear audio spike when the ball passed the bat. Rishabh Pant was doing very well, that's why some supporters might address his wicket as controversial. But I would blame the captain Rohit Sharma for this defeat. He was in a hurry mode to finish the game instead of showing some responsibilities, and got out by playing a poor shot. It was only 3rd day of the match, they could have won it by building up a good opening partnership by playing in slow and steady.