Hi, when fighting, if an enemy is in an area that is discovered but not visible, and in the range of a ranged attack (or might only be an archer) shouldn't it be that you can't see or attack the foe?

In my case the enemy disapears but if i hover over the tile it shows the name and life and all, and i can attack it with my archer, even when it's not in sight.

This happened in the prologue with Aessa with her crossbow, if it matters.