This is not so much as a bug as it is just confusing.  When you have two or more stacks moving at the same time, i.e. plotted movement from last turn, they both move and resolve simultaneously.  For example, I had a stack heading to a quest starter as another stack was moving and being attacked by wandering mobs.  I got the first two screens of quest dialog, at which point we switched to the other fight, and when the fight was over we went back to the quest final dialog.  Is it possible to have one group/army/stack interactions all complete before the next one starts.