Does the AI coordinate attacks and share information (even when not teammates)?

My family and I like to play against the AI on Extreme difficulty. Often, we set the game up so that there are 3 teams: humans, AI team, and another AI team. VERY frequently, it seems like as soon as I send troops out on one side of the map against 1 AI team, the other AI team launches an attack on the other side of the map. It is almost as if all AI share a line of sight, even the ones that are not on teams with each other.

It is beyond mere coincidence. Usually within 15-30 seconds of me sending my army out on one side, an all-out assault commences on the opposite side of the map. This almost suggest the computer knows my army is busy elsewhere. Any chance there is a bug when you check the share light of sight with teammates option in the lobby menu that it shares between all of the AIs by default? Just a question.