I am posting them all together this one time.

1. Sometimes models of units aren't disappearing after the fight, i had this especially often with bandits
2. After killing a unit guarding a treasure, the treasure marker sometimes doesn't show up after the fight
3. In another game i had an army that would always move without me having given the order, i could not reproduce it in other games, and sadly overwrote the other game.
4. On a Quest to rescue slaves i was promised a pioneer but did not get one. In the same game later on, when doing a similar Quest it worked. Need to start writing down the Questnames is guess..
5. Not sure if its a bug or wanted or i'm doing something wrong - Armies sometimes move into the city if you have moved them to a space outside the city. Also, sometimes you cannot properly move them outside, they'll show up at places not intended. I find this rather annoying.
6. The shrinking spell causes negative attack values
7. Level 9 heroes cannot be recruited because they ask for negative gildar, had the trait that you don't need to pay for heroes.
8. At higher levels, (or army sizes ?), healthbars don't fit the units health after being damaged. The bars just dont drop.
9. Got a dragon eye from a Quest, but it is neither usable nor sellable (0 value)
10. The pre-combat screen sometimes only shows one unit of an army, even when more will fight (big army size, or maybe stacked armies?)

I also have a question on bug-reporting: is there a compilation of known issues somewhere?