Completely confused. Who? What? And most importantly - whose?

Is this cloning?

When creating a map, the hero is displayed in the city screen at the gates, even if you move away from the city on the map. Every time you try to move, the city screen opens, where the hero icon is at the gates on the screen, even though he is moving on the map.
There is also another problem: if the sleep timer is set too low, and the CPU load is high, then the game freezes permanently. If you set a high sleep timer, it becomes uncomfortable to play.

Added after 1 hour
When entering a city, reduce the mana of the hero who is in the city, whether it's an enemy (before the battle) or your own hero.