Recruiter reached to me proactively to schedule an interview. I couldn't make the initial time she proposed, and proposed to reschedule for the next week. After that, a complete ghosting despite multiple attempts to reach out — even though I was referred by a colleague. I later saw the job title had been changed after the initial posting, perhaps making me not a great fit anymore. That said, a little professional courtesy would have been appreciated. The recruiter initially engaged me, after all.