Affirm Software Engineer II interview questions

First, a standard 30 min screening call with HR. Then 1h live coding with one of their engineers and a nice short chat. Next was 30 min call with 2 managers. We dropped the interview process after this one. I don't know what went wrong here. The managers weren't as friendly as the engineer I talked to previously though - no smile on their faces. I've waited for a week to get some feedback after this stage and they gave me some generic answer, but only after I sent them an email about it.