Amazon Reliability Program Manager interview questions

Interviewed with Amazon several times, including receiving a past offer so I am familiar with the process. Completed a by the book (their book) interview with a Senior Maintenance Manager lasting 45 minutes only to be emailed I was being passed on the following morning. This is the second time recently I have gone through this process to be passed on. The last time I went all 4 rounds. Not sure what their hiring criteria is, each time I felt that I interviewed well. I have to wonder if they're just through darts at a board.