I think UE4 not working correctly on a couple of tests in multiplayer Client:1 never shows anymore i have two windows open one is server and one is a client version 4.27
should say Client: 1_My_PlayerController1
It maybe because you are using playercontroller ID:0 in your blueprint?
you need to get the current player id first:
Feed that into your GetPlayerController
Hope this is what you need!
Stewart