Booking.com Senior Software Developer interview questions

I had two interviews both for BackEnd & FrontEnd. Each session has simple coding tasks in front of 3 engineering managers. I got positive answers from the interviews. 1 week later I had a response that says they were not going to go any further. That's ok. When I ask 2 times what was the reason, got no response. The thing that annoys me is that until the interview processes, recruiters are very polite and talkative. But when you ask for the reason, they are ghosting..

I was invited to Recruiter connect first and after that Technical face-to-face Coding round was scheduled. I got a graph problem which I was able to solve by DFS and later apply the Djikstra algorithm to improve the time complexity. Overall it went well and I was waiting for the feedback and the next System design Interview to be scheduled. But after 4 days I received an email that I am no longer considered for position. It doesn't feel the technical Interview went negative because the panelists mentioned they were satisfied with the result and good luck for the next round. I believe the position is filled hence they have to do the cost-cutting.