AIPerception Sight check success, but target is invalid

AI check sight success(CanbeSeenFrom), but in PerceptualData, the Target in FActorPerceptionInfo is abnormal, so GetCurrentlyPerceivedActors return inccorect result.

I also try the perception updated event, the target in actorperceptionblueprintinfo is abnormal too.(It print a empty message when I connect it to print node , without none error).

The AI debugger also cannot print sense result(a green sphere) when the situation happened.

This problem happens on a dedicated server. The server has a client(player character, HTC vive character).The AI cannot check player after player died several times.