LT4363 is burned after being powered on.

LT4363 is burned after being powered on.

The LT4363 does not burn every time when powered up. There are 2 burned out of 20 boards. The rear stage power supply is not shorted to ground.
Can you help me analyze why the PIN 3 is burned. What measures can we take to prevent the LT4363 from being burned?
Thank you very much .

N19 is LT4363 and pin 3 is obviously burned.