RemoteCameraRobot doesn't work w new hostname


I am a teacher running 5x GoPiGo3’s with Raspbian for Robots v2017.10.05 and current firmware and was trying to run RemoteCameraRobot example code from VNC and could not get it to work. The Joystick would appear but without video or motor control. After much time spent running through various possibilities, I discovered that it was simply the hostname change from “dex”. Since I have 5 machines running simultaneously, different hostnames are needed. (new hostnames were simple one word names). I changed it back and forth twice to check, and it worked fine with “dex” each time. Is there any solution to this, or do I need to leave this lesson aside?