CAPE CANAVERAL, Fla. — SpaceX has traced last month’s loss of a flight-proven booster to an in-flight engine shutdown, according to a top company official.

The loss occurred during the company’s Feb. 15 launch of 60 Starlink internet satellites. The booster, B1059, was making its sixth flight and successfully delivered its payloads to orbit, but missed touching down on the drone ship Of Course I Still Love You, which was deployed in the Atlantic Ocean to support the launch.