I have always been using fire spells, namely Firebolt paired with impact for some nice power. As you obviously know, impact stuns the enemy if a spell is dual cast. So whenever I would fire a firebolt (or any other spell), the target would be stunned (usually humanoids kneel for a second before fighting again). Of course when somebody is stunned you can freely bash him like crazy. The problem is Lightning Bolt doesn't do anything on a stunned target. It completely ignores it and just goes straight pass it. Basically, it deals zero damage to a stunned target.
Is this a known bug? Or what am I doing wrong? Every other spell works fine, but shock spells.
Thx