Unity interview questions

I applied for a senior software engineer position in a specialized field on the website (something like AI for example). The position is a strong match with my experience. Then 2 months after (it was probably a first red flag) I received a semi-automatic email from the recruiter asking for availability for a phone screen. I replied because the position was very interesting for me, then we spoke on the phone briefly, by the way she called one hour and a half before the expected time. Probably a mistake due to west coast/east cost in NA. The recruiter was nice on the phone, she explained the role and told me I will do an interview with a member of the team I applied for. Shortly after the call I received a calendar link for setting up the interview. In the meantime I received an offer (after all I was interviewing since several weeks at other compagnies). I sent a mail to the recruiter with my availability and I informed her I received an offer and my time is constraint by a pending offer, she didn't reply. But the interview was set up by a recruiter coordinator with the lead of the team I applied for. We spoke for almost one hour on a video call. My interviewer was nice and friendly, it was more a discussion without any coding question. He started the interview by saying he liked my resume (it seems honest) and we discussed the role. He asked some questions on the subject, nothing difficult, it was more a conversation. He explained the challenges of the job and we spoke on that, he also described the team working on that at Unity. At the end of the interview he told me again he liked my resume since I have a PhD and research experience in the field and he asked if I have other offer. I told him I do and the sooner the better for setting up further interviews if they wanted to move forward with me. He acknowledged this and once again I believe it was honest. Then nothing... 4 days later I emailed the recruiter and I asked for feedback on my interview (I had pending offers with not much time left). She didn't reply to my mail, so I figured I was ghosted, it was especially disappointing because I believe the first interview went well. A few days after I saw a new post from my recruiter on a social network with a link to the position I applied for. Then I was 100% sure I was rejected and ghosted. Obviously I misread how my interview went, but still I had better hopes with Unity, with at least an automatic rejection email. This is surprising especially by reading other experiences with Unity on this site. Overall the process took almost 3 months and ended up by being ghosted.