Amazon Sr Software Engineer interview questions

There is 1 telephonic interview. After clearing I was scheduled for on site loop which has 6 interviews including a lunch. Interviewers included Hiring manager and 1 or 2 people from the team and others were from different team. The technical questions were very easy and they want you to write all code on board, which I did. Each interview will also include leadership principles questions that you need to relate to your previous experience. This is the tricky part and luck involved. The interviewers themselves are not competetitive but they have a set of questions for leadership principles and they write down what you say and what you write on white board like typists. They do communicate that you are doing all good but don't believe that you have cleared that round. I thought I did well in all interviews and the interviewers themselves were all showing positive signs. I couldn't believe that this would be lost. However, a day later I get an email that they are not gonna make an offer. I would definitely do not recommend taking interviews with Amazon if you really care for your time. The interesting part is they do not communicate any feedback of why they would not like me.