Weird things with chests in battles

[Valerio80]

Maybe someone posted something about this already, but i have a few doubts on how chests in battles are generated.

I fought a troop on the first map of the game, grabbing a chest with a very nice +2 magic runes. Then for various reasons i had to reload and do things a bit differently, so some time passed before i fought that same troop again. When i did the chest was there, but with only 1 magic rune.

I tought that alla these things were fixed at the start of the game, so this somewhat surprised me, ad i decided to do a few tests:

- I tried again that troop with a previous save, and no changes (1 rune)

- I tried that troop from a save i had of my very beginning, and no chests at all (?!)

- I tried to fight that guy, grab the chest and then run away. When i went back to fight it again there was another chest, so i grabbed another rune! When i tried the third time, instead, chest was no more there, and more important all chests in other fight in the area (i tried some) had no more their chests! I'm sure they vanished cause i tried them without doing first the "run away" thing and they had some chests.

So, in conclusion, chests for battles does not seems to be fixed at start, but seems to change for various reasons... anyone knows more about this?