Investigate behavior in multiplayer applications

[j9liu]

The team doesn't have much experience developing multiplayer games in Unreal, but users have reported some difficulties trying to get it to work. It may be worth taking some time to figure out what happens and to see if there are reasonable ways to troubleshoot.

Some systems could get complicated by multiplayer -- for example, having players be at different locations on the globe and wanting to move the georeference to their respective locations. It's also not clear how we would have to manage tileset selection between the cameras of multiple clients.

[j9liu]

See #1558 as well as https://community.cesium.com/t/current-state-of-multiplayer-server-dedicated-hosted-support/36898. The post links to other forum threads about multiplayer as well.