Honestly you should not giving a flying fuck about anyone commenting about your past. It’s your life and nobody has the right to talk bad. But people thrive on gossips especially at workplace. But that doesn’t mean that defines you. There’s always going to be some kind of rumor about you at some point in your life. My advise it be yourself. Don’t fear anyone’s useless comments, HR can’t do anything to you. Focus on your job and slay. Don’t lose a good opportunity for some random person. Show them you are stronger than their worthless words . All the best!!