Sikka Software interview questions

During the interview process, I had asked them if this position was newly created in which they replied with a yes which is why it is not listed. That being said, the interview process was fairly straightforward. Phone interview followed by an assignment to take place of the second interview. Finally, I had made it to the on-site and that went okay. However, my only problem with the interview process was the lack of communication. This company completely ghosted me after my on-site interview. I just don't understand why a company would do that to a potential candidate knowing that they put in the work to get to this point. A simple "no" would have sufficed for me but this company decides not to say anything, leading me to wonder for a week what went wrong. Completely unprofessional of them.