To be honest I would be very surprised if this was Cox as an organization and not just one or two very passionate workers who understood the severity of the issue and stayed after hours fixing it for free.
Seems more like a configuration error. Load balancer balancing over a few hosts, one of them missconfigured. Most likely over 2 hosts given the 50/50 success ratio of the intruder test. If that’s the case then it’s easy to fix in such timeframe