https://arstechnica.com/tech-policy/2019/08/apple-and-google-temporarily-stop-listening-to-siri-and-ok-google-queries/

Apple workers have stopped listening to Siri queries worldwide, the company said this week. Apple plans to bring back human reviews of Siri voice recordings at some unspecified date, but the company said it will only review them when customers specifically opt in to the practice.

Separately, Google today confirmed that it recently "paused" human reviews of Google Assistant queries worldwide.