Mumbai%2C Sep 22 %28SocialNews.XYZ%29 Southern sensation Rashmika Mandanna%2C who is all set to make her Bollywood debut with %26%238216%3BGood Bye%26%238217%3B starring megastar Amitabh Bachchan%2C said that for her%2C dubbing in Hindi was a little challenging%26%238230%3B.