I got the interview offer at the beginning of Dec , 2019. at the day of first round interview, i received another email from HR that the date has to be reorganized because she got some personal business and have to leave. thats total fine to me, however, few days after, i received another email from another HR that she left the company and he will take care of my interview and ask me to submit another time sheet. i did what he asked and guess what, never heard back from him again, even with few follow up emails.