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The thing is, this bug only appears in the pirated version of the game! It doesn't exist in the licensed version.
And I was surprised that this level is too easy to complete. Guys, play on "hard" difficulty. There, after approaching the village, a human hero arrives with 170 upgraded Crusaders and a decreasing number of other units. Then, from below, a secondary hero arrives with an army equal to mine. And in the three castles (besides the main one), three heroes are accumulating unreal armies. If this is an easy map for you, then I don't know anything. Yes, I passed it on "normal," but on "hard"...
What are you talking about? I have a licensed version from Ubisoft, and this bug exists. Experts on pirated bugs are crawling out of every corner. I don't know how to fix it; reinstalling the game didn't help. I wrote to Ubisoft support and am waiting for a response.