Child Actors do not replicate to clients when running project with "-game" command

Child Actors do not replicated properly to clients when running a project using the "-game" commandline argument. This does functionality does work properly in PIE and in a cooked build however.

Regression?: No
This occurred in 4.18

1. Download the attached project
2. Place the attached project in your engine's root folder (the same folder as Engine, Intermediate, Feature Packs, Templates, etc)
3. Run Launch.bat twice
4. In one of the instances, run the console command "open 127.0.0.0" to connect to the other instance
5. In the client, look for the Sphere beside the cube (not the sphere representing the host)
   Result: The Child Actor sphere is not there as it has not been replicated
   Expected: The Child Actor sphere is visible.