There is an issue with killing the Treasure Gnome. From time to time you don't get the gold for beating it. Occasionally it happen, when you beat the Gnome and the barrier at the same time - even if the creature kills the gnome at first and the barrier afterwards in the same turn.
Today I saw another issue. I killed the gnome during the game, but without killing it directly during the turn. My Elfling used it's flings and hit a bomb next to the gnome - so it got killed by the bomb. But I didn't get the gold afterwards - the game just told me it wasn't killed.
Excuse my English. Hopefully it's understandable nevertheless.