TOURNAMENT TROUBLES!

The player cannot know what the map creator had in mind. Perhaps they created intricate quests that are difficult to complete, but at the same time, they gave you wings or assumed that you could buy them somewhere. So that the player has the opportunity for alternative solutions – either to complete the quests or to get wings and bypass the quests. Where is the guarantee that the map author didn't intend it that way? And with all sorts of prohibitions, you might be distorting the authors' ideas yourself.

Notes:

1. This map contains the artifact Angel Wings. It is forbidden to use it to move around quest guardians. To visit an object that is guarded, you must first remove the guard and only then visit the object (in particular, this refers to the Fort on the Hill). It is also forbidden to visit castles without first removing the guard (neutral units guarding the entrance to the side castles and the Pandora's Box near the lower castle must be removed before visiting the castles).

If there is at least one foreign unit in the army, there will definitely be a penalty. This is an internal rule of the game.
However, one trick has been noticed – it turns out that there is a way to carry neutral troops (nomad, mummy, hobbit, wizard, etc.) with you in such a way that they do not trigger the penalty. To do this, the neutrals must be placed to the left of the units for which the terrain is native. This is not a documented feature, but it always works.
---------------------
Carrying an army without a penalty across rough terrain means it's a feature, not a bug, although you say that THIS contradicts the internal rules of the game itself. However, the disappearance of upgraded neutrals after a preliminary attack on a mixed army is, in your opinion, a bug, not a feature. Yes, you really need to learn some logic from AmberSoler. Well, I don't care – the main thing is that what is allowed and what is prohibited is made clear to everyone, and this must be taken into account.