I had a problem playing with friends today.

I have put my army in such a way that the enemy could not catch (with even infantry can't reacy my zone of control).

But when turn came to him, his infantries were catching up with zone of control of my army.

So, then he put infantries near of my army and attacked with his 1 Warg Raider.

This broke the hotseat because I lost my 1 strong army. How is that possible? Is that a map bug? I have saw, my infantries can't catch with his "zone of control" but his infantries can catch with my zone of control? Aren't the all infantries same?