Forgive me if I'm wrong, but, I don't recall the two unused units (cargo & mercenary gunship), changing their wireframes completely like this.
I know that, I'm just saying, in the older patches, you couldn't select them both at the same time EVER. And now, you can, and they become invincible no matter what you do. So, in a map like YuGiOh, the ones that used these units to give extra cards, don't work anymore.