Bristlecone Senior Software Engineer interview questions

Got call through recruiter first round was technical for c sharp react and aws. Went well and they asked for second round client round and it was technical plus managerial it also went very good with almost all correct answers. After 3 days got call from recruiter saying interview reject without any reason. Strange.

First round technical interview (may include aptitude) Second round technical interview The third round will be the HR interview, process will rely on several factors of the candidates and the interview may not be the same as it is for all applied candidates