UMG in Multiplayer. Swap Controller Bug?

In My HUD blueprint is Checking the Character health, if the health <0 the client who die will shows respawn widget.
But someing wrong here, It seem like swap the controller. When I input in Client2 viewport ,the character in client1 moved . And When I click the Widget in the Client1 Viewport,the death one,the debug message "Hello"is seem like sended from client 2. I dont know Why,so can someone know how to fix it, really thx.