Zscaler Senior Data Architect interview questions

I had 2 rounds of interviews. They went well. The questions were challenging but nothing that I hadn’t worked on, so I didn’t have any issues. After the 2nd round, I got an email that my application is selected for the next steps. However a few days there was no update, so I decided to follow up and I was told that they’ve gone ahead with other candidates who were more suited. No further explanation was given. It was a bit head scratching and confusing, to say the least.