GAMEMODE:
The ROC_UpdatePlayerDatas event is called here with AllPlayerNetIDS with iterating AllPlayersInTheLobby MenuPlayerController array.
As you can see below server gets the NetIDS just fine. But client gets an empty array. Why?
Server:
Does this also not work with other data types? Try passing not an array, but a single variable (for example a string).
It’s likely that your structure is broken… 
They love to do this.
I did with a random integer array and it worked. The reason this occurred is because NetID is passed by either player controller or player state. I was using a player controller at the time and because player controllers are specific to clients it wouldn’t work. So I decided to do the logic in the player states rather than player controllers so it started working just fine.
