Synopsys Test/Characterization Engineer interview questions

Recruiter contacted me to schedule a call with her. During the call, she seemed very interested in my experience. We spoke for about 45 minutes and concluded with her scheduling a 1 hour phone call with the engineering manager of the hiring team. I never ended up receiving a call during that scheduled time. I reached out back to the recruiter to ask if she knew what happened and she never responded back to me. It was very weird because towards the end of my initial call with the recruiter, she said had a lot of experience in vetting candidates and she already knows I have a very good chance in getting the job. She also tried to make me promise that I won't interview with other companies until my interview with them. If they changed their mind, I wish they just sent off a quick email cancelling the interview. Instead they wasted my time. I took this hour off work and I sat by the phone for an hour. Not to mention the time spent towards preparing for this interview. This is very unprofessional. Beware when you interview with Synopsys.