Amazon Sr Data Scientist interview questions

Applied through a referral. I didn't actually apply for a senior role, I applied for a mid-level DS role, but they switched the job rec on me mid interview process. The recruiter was 40 minutes late to our call, and spent only spent 5 minutes on the phone mostly confirming the skills from my resume. Told me there would be two tech phone screens and a virtual onsite if I passed. Between the recruiter screen and first phone screen, the job description changed on me without notice, from mid-level to senior, and requiring 5 years of experience with ML. Phone screener asked me solely about ML for an hour, especially XGBoost, and didn't ask if I had questions until after the allotted time. When I asked about DS there, they said they were in a role very different from what I'm applying for and that they couldn't tell me what it would be like. Got a rejection the next business day.