Tesla Autopilot Driving Team interview questions

Got an email from the HR person saying they liked my work and are interested in talking . She set up an initial exploratory HR phone interview - which went well . Just asking you questions from your resume directly.HR people cant really probe you with technical questions and she tried to ask me a few questions that even she didn't fully comprehend.I was told that there would be two technical rounds after she would forward my profile to the driver assistance and vehicle automation team.Two weeks went by with no feedback.After pursuing the matter through email a technical phone interview was set up with the person incharge of my team. I spent a lot of time preparing for the interview - he did not ask me any technical questions - just more resume probing and asking about projects I had done in the past.He sounded like he was in a hurry and said he was getting into a meeting .He then asked me if I had any questions - I had actually prepared 3-4 questions to ask him (Employee development at Tesla - Background of the people on his team - Do the people on his team work individually or collaborate on projects .He sounded unsure in his answers and I wasn't satisfied with the responses I got from him). He spoke to me for exactly 17 minutes and said he was getting into a meeting and had to cut the call short. Got a mail from the HR person the next day saying that I didnt cut it.