By looking at units hit points during a battle, one can see that they get updated well before the animation, thus giving away a few seconds too early the supposed suspense of the attack's outcome. That in itself is a bug IMO: the animation of the attack should come before or at the same time as the numeric update.

Let's suppose now that you are about to strike for the last time the last enemy unit remaining on the battlefield. If you click on that unit but don't wait for the last attack to take place (there is a short delay between the clicking and the animation). If instead than waiting for the animation you just look at the enemy hit-point bar to go down to 0 and then just auto-end the fight with the left button of the UI BEFORE the animation of last enemy unit dying takes place: after the battle the enemy unit is still present on the strategic map, although it is dead (you cannot interact with it and I believe the following turn it is gone).