I'm confused by this, I've had pods that clearly have no idea I've infiltrated the mission suddenly get a turn and crit kill my soldiers through full cover when they patrol into my unconcealed squad. I understand that yellow alert means they can do this, but pods that are walking and wander around the map still do this to me, and the only soldiers that have died in my campagin so far, were killed by pods that were 'green' and therefore shouldn't be able to get a free shot off.

Is this intentional? And if so, how do I disable it?