Bloomberg Sr Software Engineer interview questions

Had one round HR interview, and one round hackerrank online interview. Rejected after the hackerrank session. While interestingly that I solved the given problem without any issue (bug-free with various test cases) within accepted time complexity. I heard people who are not able to solve two problems will be rejected. BUT I WAS NOT GIVEN THE SECOND PROBLEM! There is still a lot of time left and I was never given the second problem. The interviewer asked me to write a lot of more test cases to waste time (while I know my solution is definitely bug-free). And when there is 20 minutes left he asked if I have any questions so that the last 20 minutes was spent in chatting :) If you don't want to hire people, don't post JD okay? If you have any other concern should at least provide feekback earlier. At least I don't feel I did anything wrong for the technical round but was still rejected.