Just getting back to the Kobold pathing issue, I've noticed that if you set up a teleporter anywhere in the bottom middle, near the lava, the Kobolds will ALWAYS walk back to base, rather than take a nearby teleporter. This leads to the complete destruction of my workforce and failure of the challenge every time, as they walk an uncleared route back to base, activating dozens of trash mobs and leading them all to the Foreman. How can a fundamentally broken thing like this, still be in the game several updates later?
Just to clarify, I have no trouble completing these challenges in a group or solo, I don't need to be advised to choose another path. That's all obvious, this is a complaint to Turbine about bad coding. Please get this fixed, I really want to just play the challenges as they were intended, not metagame the bugs and AI.