From Bright Pattern Documentation
How to Stop or Pause Call Recording
Depending on your permissions, you may be able to stop the recording of a call (e.g., per a customer request) or pause it temporarily (e.g., in order to prevent some sensitive data from being recorded). Your system administrator will provide instructions for when call recording may have to be stopped or paused. You can stop or pause recording at any time during your phone call.
If a call is being recorded, the call recording button will show the stop control 
.
To stop recording of the call, click the button. The recording will stop from that moment, and the button appearance will change to show the start control 
. To resume recording at any time, click the button.