It could be either the AI thinking that it's better to be prepared than to be caught off-guard, especially with how Hitoshi was confined, or there might have been secret orders that Hitoshi wasn't told about.Hitoshi did mention his ship is stay up above the planet still, could be some hidden directive on the ship.
Edit: just reread through the series again but in chapter 5, he did mention "Haruko", probably an AI assist so i do wonder if the system was set up so they will come for him or to attack the new planet with those smart suit in someway.