Ah, yes. I completely forgot to report that one as well. The same thing can happen with the other ant species. (F. Fusca and F. Rufa)Ha - I didn't realise you could trigger the female scientist to talk by making your first leafcutter during the challenge, she was supposed to have left the room!
I don't think the enemy is actually stuck - I think the AI controlling them is deciding not to head inside. I'll have a look today, my guess is that there is a timer running that blocks them from entering the player nest for the first few minutes of the challenge - that or they are scanning your underground and deciding it's too dangerous which it clearly isn't.
http://forum.slugdisco.com/index.ph...omone-group-targetting-can-be-exploited.4060/I also think I have figured out the opponent tries to chase after group 1 if it is above ground.