Cool! I don't believe I was referencing any specific challenge. We've had a number of challenges throughout the years that have had these issues. The most common culprits are challenges hosted by Asian organizers, as the ping times from America to some parts of Asia tend to be quite bad sometimes.

The challenge you're describing sounds cool - I wish I'd played it! By the time I started playing DEF CON CTF though, it was with LegitBS as organizers.