In mission 3 the player has to rescue an evac transport fileld with colonists. The mission is suppose to fail when the evac gets destroyed. BUT when you put the evac into a garage before you transfer the colonists to a residence, op2 can't seem to find the vehicle anymore, and thus signals a mission failure.
I will look into a way of getting around this bug, but for now: just don't put it in there. First transfer the colonists by putting it next to a residence