3 rounds on-site; one easy leetcode, one react-focused, and one frontend system design Interviewers were extremely nice. I was slow on the leetcode round because I was nervous but the question was very easy and I was able to solve it in around 15 minutes. Did decent on the react challenge and system design rounds. After the on-site, the engineering manager scheduled a manager interview for the next day. I assumed it would be behavioral but he ended up asking me a coding challenge. I was caught off guard and fumbled. Was able to get a naive approach down but needed a bit of his help at the end. This was a negative experience since I thought the interview rounds were already over and was not expecting any technical questions with the manager. Thought this was poorly handled. Rejected and got feedback that they liked my experience and design skills but fell short on problem solving