Amazon ASIC/FPGA Engineer interview questions

I interviewed with a team working on their Leo project. Recruiter contacted me on LinkedIn. She was very nice, until I completed first round of interview and then ghosted me after I got their automatic rejection email. She lied to me that she has no visibility into any feedback provided by the interviewers. A Week later she called me and spoke very nicely again to ask if I am open to attending another round of interviews but for role at lower grade. She didn't provide any details include pay range. But I agreed for the interview and prepared for it seriously. And then she ghosted me again. In addition to wasting my time, she was very unprofessional and lacked basic decency.