[Bryan Herbst]

I saw this on Galileo once as well, and we had a similar "issue" while setting up the field at 10,000 Lakes.

At 10k Lakes the cause was a bad cable running between two of the signs.

This typically isn't a symptom of an issue with the FMS. It could be a bad cable, or it could have gotten jostled in just the wrong way from a robot or a ball hitting the alliance station.