Ansys R&D Engineer interview questions

First interview with HR screening. Second interview with manager, asked about experience, described role. We both saw high alignment. Third interview with engineering manager, did a technical coding question, very easy. Was told I did well. Then didn't hear back. Reached out a few times and was told that they had emailed me but it "must be in spam" - it wasn't. They said they decided not to move forward. Great feedback in interviews though. No feedback as to why not.

First round is a phone call from HM, asking about relevant projects, skill sets, and basic screen. Second round with HR, mainly some basic screen. Also asked about expected salary. Third round online presentation to HM and a senior team member and the skip manager. Onsite is a presentation to a broad potential colleagues, followed by group interview with potential teammate, colleagues from other teams, managers from other teams, chief technologist, distinguished engineer in the department. Then had lunch with the VP of the department who is the manager of skip. Then wrap up with HM and skip. All questions are related to relevant project and domain specific knowledge.