Before contacting me at all, the Indeed recruiter sent me a calendar invite without any explanation. Eventually he emailed me and said that he wanted to set up an interview with the hiring manager, confirm my interest, etc.; I told him that I was booked at that time and asked if we could talk the following day. Instead, he sent me an email for later that same day (!), which I declined. Finally he sent me an invite for the following afternoon, and of course he no showed the call and didn't respond to email.