Hi,
in the attached save game there is a Henchmen army standing directly next to a quest location. It's the only army that has moves left. When the quest is triggerd the following combat can be decided by just one move of one of the Henchmen. The Lord of the Flames does not ever fight back and none of my units is ever hit. Nevertheless in the post fight status report the leader of my army is shown as being wounded in the combat. I had this in another quest before too, but didn't have save game for it.
https://www.dropbox.com/s/wg114brqipftapz/CommanderDies.EleSav