Red Hat Software Engineer interview questions

Got my phone screen 3 months after applying online, that part was pretty positive and I thought went well. A month later, scheduled a second interview. I got sick and asked to postpone a week. Then 3 days before the interview, I notice the jobs site says "no longer under consideration". I'm kinda bewildered why the sudden change of heart, but regardless candidates should at least get an email informing them of the change. I had to ask, and was told I'd get an update after checking with the manager, which I never received. It's fine if you wanna reject me as a candidate, but there's a right way to do that. It makes me wonder if the HR department can't keep up with the hiring they've been asked to do.