This I think was poorly communicated. I found it out by accident, prior to that it seemed like Siri had taken a nosedive. "Hey Siri...." waiting.... followed by

This I think was poorly communicated. I found it out by accident, prior to that it seemed like Siri had taken a nosedive. "Hey Siri...." waiting.... followed by the cancel tone or sometimes "Yes?" - then the cancelled tone.