These rejections are frustrating and make no sense

I'm a senior dev with many yrs of exp. I'm still employed, but looking for better opportunities. A few weeks ago I came across a job posting and I had like 99% of what they were looking for, so I applied. A few days later I got an email from an HR person requesting a phone call. The call went great, we talked about my experience and they seemed to think I was a good fit. They said they would pass on my info to the hiring manager and I should hear something soon. A few days later I get a rejection email. Today, I see the exact same job just got reposted. I don't know what these companies want but it's very frustrating and demoralizing if you're a job seeker. I can only imagine junior devs or people with out of date skills have it even worse. If I was at least given an interview with the hiring manager (technical or otherwise) and bombed it, that would be fair, but I was rejected without the hiring manager ever meeting me, even though the HR screener thought I was a good fit. Anyone else had an experience like this?