Clients Joining a session destroy and recreate all actors in the level upon joining

When a new client joins a server all of the actors will be replaced with new copies of themselves. This will cause things like the construction script and event begin play nodes to fire off every time a client joins a sever even though the level is already up and running.

1. Create blank project
2. Add the following to the DefaultEngine.ini (<YourProjectDir>/Config/DefaultEngine.ini)

   [OnlineSubsystem]
    DefaultPlatformService=Null
   

3. Open Project
4. Create a new Widget Blueprint
   Right click content browser > User Interface > Widget Blueprint
5. Open the new widget blueprint
6. Add two buttons
7. Name them Start and Join
8. Open the event graph
9. Add the blueprint in the attached image
10. Save and compile
11. Create a new Actor Blueprint
    Right click content browser > Blueprints > Actor
12. Open Actor blueprint
13. In the construction Script: Run a print string from the construction node that says "construction in running"
14. In the Event graph: Run a print string from the event begin play that says "Event begin Play is Running"
15. Compile and Save
16. Create two levels, Name one of them "NewWorld" and the Other Main Menu
17. Open the level "NewWorld"
18. Add the actor that was created to the level
19. Save
20. Open the level "Main Menu"
21. Open the level blueprint and add the widget to the viewport
    Event begin play > Create Widget > Select the new widget blueprint > Add tot viewport
22. Set the number of players for PIE to 2
23. Click Play in Editor
24. As the Server Click the "Start" button
25. As the Client Click the "Join" button
26. Notice that the Print strings ran both for the server and the client

[UMG] 3D Widgets are replaced when a new Player joins a Session