As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING DESCENT, THE PILOT REPORTED THAT THE ENGINE TORQUE DROPPED TO ZERO. SUBSEQUENT POWER LEVER MOVEMENTS HAD NO EFFECT AND THE ENGINE FLAMED OUT. APPROXIMATELY 12 SECONDS LATER, THE AUTO-RELIGHT RESTORED ENGINE POWER AND THE FLIGHT RESUMED NORMALLY. TROUBLESHOOTING IS ON-GOING.