IMEC (Belgium) Systems Engineer interview questions

The application process took 3 months. First, there was a phone interview with two hiring managers, then a call with HR and finally a half-day interview at imec involving a presentation of my research background, a technical brainstorming discussion with a wider team of researchers and managers and talks with HR. While I enjoyed all the technical discussions, the process was very long, with sparse feedback. There can be a month long of silence before getting any news. Most baffling part, in the end I received positive feedback but I was rejected as the role was redefined.