As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE A/C STARTED TO DE-PRESSURIZE. CAPTAIN RECOVERED THE CONTROL IN MANUAL AND DESCENDED TO FL 200. FLIGHT CONTINUED TO DESTINATION. A/C PLACED ON MEL FOR MANUAL PRESSURIZATION. CPC WAS REPLACED ON 23-JUL-2019. NO FURTHER PROBLEM REPORTED BY OPERATOR. (TC# 20190807009)