Rejected immediately even after solving 2 questions optimally at Amazon SDE 1 Onsite. Is Python a red flag?

Just finished an onsite loop with Amazon and I’m honestly baffled. I need some perspective because I’m replaying the whole thing in my head and can’t figure out where I failed. The Round: It felt pret

Just finished an onsite loop with Amazon and I’m honestly baffled. I need some perspective because I’m replaying the whole thing in my head and can’t figure out where I failed. The Round: It felt pretty easy. I was given two standard questions: 1. Minimum Number of Days to Make m Bouquets (Binary Search on Answer) 2. Course Schedule (Graph/Topological Sort) I solved both optimally and explained my thought process clearly. The coding part went smooth. The Behavioral/LP: I answered the Leadership Principles questions well, though I noticed the interviewer didn’t seem super interested in digging deep into them. The feedback loop: At the end, I asked for feedback and she explicitly said I "did really well." I was sitting there prepping for the next round, fully confident I was moving forward. Then HR walks in and tells me I’m cut. I was so confused I actually asked them to double-check the result. They were sure. My theory: The only "issue" I can think of is that I wrote my code in Python. Is there some unwritten rule against Python for backend roles there, or did I just get a false positive on the verbal feedback? Has anyone else experienced an immediate cut after a seemingly perfect technical round?