Garmin Design Engineer - Entry Level interview questions

Got a call from HR recruiter asking to set up a phone interview. Had phone interview 2 days later, several behavioral questions, and a checklist of technical questions that recruiter typed my responses. Interview seemed positive. Deferred nearly all of my questions to the potential followup interview, then declined to offer said interview. Rejection e-mails came for all open positions I had applied to, as if they hit the "flush candidate down toilet" button on me in the applicant database. No reason given.