This is still happening in 4.10.4 (I’m also using it as a base for my own MP game), and Chooka’s workaround below doesn’t seem to work. There are also a bunch of compiler errors when you create a new Multiplayer Shootout project and open it, about not being able to connect some pins because of old classes and such.
Would be awesome if this example project could get an update, since it appears to be only real example of handling MP player-joining-a-server stuff in blueprints…