Hello! My friends and I play this game cooperatively against the AI. We have encountered an issue where we can effectively trap AI fleets in a single gravity well indefinitely, if we so choose. This happens when we set 1-2 (or more) TEC garrisons in neighboring gravity wells to "offensive roam," which causes a steady stream of garrison ships to fly to the hostile system where the AI fleet is. Although the AI would normally leave that gravity well to attack more planets, it ceases its jump every time one of these new garrison ships appears. This just traps the AI fleet there for as long as we allow it.

In theory, this comes down to a matter of human willpower to not abuse this exploit (a matter of ongoing debate in my group!). Nevertheless, the AI should not be distracted by the regular arrival of a one garrison ship at a time. 

We hope you can correct the AI's behavior to have a better sense of proportion in these matters, so that it will continue its conquest. Thank you!