In the third interview, with the product managment team, I was asked mostly technical architecture and business questions, in my opinion, inproper of a designer interview. Luckily, before designing, I've developed software for many years and have a lot of knowledge. So I could answer with full confidence.
Worse still is that the interviewer confused himself on some of the technical questions and ended up confusing me. I had to correct him at a given point, and that meant I was out. It was a question about PWAs that, just by chance, I had worked on a month ago.