[W|0.8.657] Hostile AI becomes active after reload

[Zilch]

Noticed in 0.8.657

Enemy raid outside base is passive and able to be hit by artillery, yet after a reload from auto save they become active and attack.

Specifically it was a crashed Mecanoid ship part outside my fortifications. Multiple manned mortars can freely bombard both the ship part and enemy Mechs.
Reloading from a auto-save taken barely 1 minute before results in the whole group of Mechs taking the offensive and rushing my base.

I expected the reload to allow me to position the new mortars I built in a different location, and the Mechs to stay put.

This most definately did not happen.