https://techcrunch.com/2019/08/01/apple-suspends-siri-response-grading-in-response-to-privacy-concerns/

In response to concerns raised by a Guardian story last week over how recordings of Siri queries are used for quality control, Apple is suspending the program world wide. Apple says it will review the process that it uses, called grading, to determine whether Siri is hearing queries correctly, or being invoked by mistake.

In addition, it will be issuing a software update in the future that will let Siri users choose whether they participate in the grading process or not.