Added 4 minutes later
One difficulty was the hero. The second time, my army was much smaller than the first time. The first time, I had 350 Assassins, about 30 Witches, 80 Minotaurs or 120, I don't remember exactly. 87 Riders, 20 Hydras, and 11 Dragons, 600 Dark Knights, and 80 Faceless Ones (I was carrying troops with 2 heroes). And the second time, when the blue player appeared, I had 12 Giants, 120 Assassins, 16 Witches, and 350 Black Knights, 20 Hydras, and 35 Minotaurs. That's why I say something is wrong. The second time, there were no resources on the map to buy troops in the Dungeon, and the heroes were 2.5 times stronger. It's strange overall.