Volvo Cars Senior Software Engineer interview questions

Interview process with several stages: recruiter call(30 min), home assignment(60 min), discussion of home assignment with engineers(60 min), system design(60 min). The process took 3 weeks. In the end I received a generic "we had to make the tough decision to move forward with other candidates" without any constructive feedback.

After the HR review, I was rejected without any feedback. I'm not sure why it happened. We only discussed about general topics and my experience, and it ended quickly. I need more feedback.