PTC interview questions

first interview simple questions in c a very nice interviewer who gave a good feeling also when I didn't know. Second interview higher level questions. Third interview with the team manger and forth with the HR

Had one HR behavioral phone interview. They were at least 5 minutes late to the interview. Some of the questions I also felt made no sense for an intern position and would just filter for people who can make up a story on the spot (see first example question). I received a congratulatory email saying I passed, to which I was pleasantly surprised, but I soon realized the email was addressed to the wrong person. It took the HR person several days to even notice and respond saying it was a mistake and that I would get an update on "next steps" later. Then over a week later they sent me the robotic, copy-paste rejection email This was an unprofessional and inconsiderate interview experience. I will not be applying to PTC again.