As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) STRANGE BEHAVIOR OF A/T DURING CLIMB OUT WITH CLIMB THRUST, THE A/T STARTED TO CHANGE THE CLIMB SETTING BETWEEN G/A THRUST AND CLIMB THRUST. ASSOCIATED WITH A SIGNIFICANT MOVEMENT OF THE THRUST LEVERS. AFTER SELECTING ANOTHER CLIMB MODE, THE SITUATION CHANGED TO NORMAL. EVENT BUTTON PRESSED. (TC# 20190726011)