Shopify Data Science interview questions

I was approached by a recruiter from Shopify and the process started. First I had an interview with the Hiring Manager about my resume and background. That was quite positive. The second interview was some coding and I did it The third interview was again a coding problem. I did it. I worked well. I passed the tests. The interviewer confirmed that it is the right solution. After the third interview, I got the rejection email. I have no idea why I got the rejection since my code was well organized, following the naming conventions correctly, and working exactly as expected. The interview system is broken.