ColorSource Spot Deep Blue Disappears and Gateway Disappear on Concert

Hello so we have an auditorium that runs off of the eos family ion xe and we have 6 ColorSource Spot Deep Blue lights that randomly go offline from time to time. And the only way to get them back as a discoverable device is by resetting the entire system via a power cycle. That fixes it but then sometimes it goes offline again. I'm not too sure if it would be a wiring issue because a simple reset fixes it. Any ideas on what might be causing this issue?

A few questions:

1. How are the ColorSource fixtures connected to the console? Via a gateway or directly to the the DMX ports on the back?
2. Do they only disappear in Concert or does Eos' RDM Device List also lose contact?
3. Is the end of the ColorSource DMX line terminated?
4. Are there other fixtures in the line?

1: They are connected via a gateway
2: The RDM Device list also loses it 

3: I hope so, I'll ask about it later.

4: Nope just the colorsources.

While we're asking about conditions, which version of firmware is running on the gateway and also which version of Concert are you using?

I can take a look but the Lights are working again :0