TPS2373: TPS2373 surge problem

Part Number: TPS2373

Hi TI expert：

i use the TPS2373+ TPS23861 in my PoE project，

When there is no DC JACK input, add the surge  ±4KV on RJ 45 12/36 Port， the testing is pass.

but when use the DC JACK, and the only add the surge ±0.5KV on RJ45 12/36 Port，the testing is fail， and the TPS2373 damage.

Can you give me some advice to avoid it, thank.

Below is the SCH and project block,