Received a phone screen request 2 days after applying online. Friendly conversation with standard questions re: background and experience. Received in-person interview request later that same day. At that meeting, I spoke one-on-one in succession for ~2 hours with a few more people from the team. Again, free-flowing conversation with behavioral questions and the expected probing around my work history. Followed up with a courtesy email 2 days later, and HR called me directly to confirm they were still "very interested" and would be back in touch in about 2 days. Great momentum so far. Then a full week went by. Silence. I sent another email requesting an update. The next day I received the "thank you for your interest" form letter without any explanation. Further messages were ignored.