Tesla Technical Program Manager interview questions

Multiple interview stages, the recruiters and hiring managers lack professional. I got first video interview rescheduled 3 times not because of me because the hiring manager kept forgetting and missing about the interview. This isn't the first time I interviewed for Tesla, same thing happened again when I interviewed for them 2 years ago for another position.

First round online interview with the hiring manager. Then onsite panel interview with five interviewers in the team. The online and in-person one both are technical. HR is not efficient. Every other employees seem to be pretty professional!