Sana Biotechnology interview questions

The interview went smoothly. After talking with HR, I had the interview with HM. I had 20 minutes of technical discussion with the hiring manager followed by some follow up questions regarding my availability and company’s culture and vision. I have been told at least twice that I will be contacted by HR for next steps, but got ghosted! It’s absolutely ok if the HM didn’t felt that I am good fit, that happens in a lot of the interviews. However, ensuring people that they will hear back for next steps, and then not even sending a rejection email to let the candidate know about the decision is unacceptable!