MuleSoft interview questions

I applied after a recruiter reached out to me on LinkedIn. After applying on their website, I was emailed a link for a video interview. I had to answer 5 questions with unlimited re-do's and had a minute to complete the question. You could not see each question until you were ready to answer it.

I have had interviews with HR, technical members and hiring manager. Interviews were done remotely. I have received positive feedback from the technical interview. After the interview with hiring manager, all of a sudden no response and no feedback were given. This is not a professional attitude. It was a waste of time.