Walkthrough for the "Tribes of the East" expansion.

I started the last campaign of the second expansion pack. In the very first scenario, I noticed something strange: after the enemy hero, Waishan, attacked Zehir and fled, a bag remained in his place (+1000 gold per day). But in reality, the bag contained not gold, but two artifacts: the Robe of Sar-Issa and the Chainmail of Enlightenment. Moreover, the hint provided a correct description: Artifacts - below - Robe of Sar-Issa - below - Chainmail of Enlightenment. Is this a bug, or is the script designed this way for this mission?