That sucks. I recently had a similar experience. Onsite interview went well with some coding and design questions and then got a rejection a day later saying I

That sucks. I recently had a similar experience. Onsite interview went well with some coding and design questions and then got a rejection a day later saying I don't have networking experience which was quite clear from my resume. I was only asked how DNS works in the interview and I answered that. I told the recruiter this wasn't mentioned in the job description nor was I asked those questions in the interview, but he didn't have anything to say.