I was goofing around in Iota in single-player, then logged into multiplayer a bit later. All of the human tradelanes are corrupted, using the single nomad ring in the middle.
Minor bug that only affects a very few number of players I'm sure but since you seem to have fixed whatever the problem was with the Gallic-Sirius tradelane corruption, maybe the same fix for this one?
Reporting so it can be added to the database and out of my brain