Many fixes in one mod for Tribes of the East.

I explained how this ability works because I know it.

At the beginning of the battle, the creature receives a "Defense" bonus as if it had moved its maximum range.

But that's not how it actually works. At the start of the battle, it doesn't receive anything until it moves to that maximum range.

P.S. If you see a real bug, report it; otherwise, keep those speculations in another thread.