Polymorphed target is wrongfully blacklisted

Hey Droidz,

I have a problem with polymorphed targets getting wrongfully blacklisted. When I fight my main target, then polymorph a second target and the first one dies:

- it never attacks polymorph
- when polymorph breaks, it recognizes "IsAttacked" state but never attacks back (my fightclass works if (Fight.InFight || Conditions.IsAttackedAndCannotIgnore) && ObjectManager.Target.IsAttackable))

I use custom code to attack the polied target and start a fight, but it seems to not work:

if(!Fight.InFight && !Me.InCombat && !_IsMoving)
                    {
                        WoWUnit polyTarget = ObjectManager.GetObjectWoWUnit().Where(u => u.IsValid && u.HaveDebuff("Polymorph") && u.GetDistance < 15 && u.IsAttackable).FirstOrDefault();
                        if (polyTarget != null)
                        {
                            Logging.WriteDebug("Found polied target " + polyTarget.Name + " attacking!");
                            if (wManagerSetting.IsBlackListed(polyTarget.Guid))
                            {
                                wManagerSetting.RemoveBlackList(polyTarget.Guid);
                            }
                            if (CombatUtil.CanWand())
                            {
                                CombatUtil.CastSpell(Shoot, polyTarget);
                            }
                            else
                            {
                                CombatUtil.CastSpell(Frostbolt, polyTarget);
                            }
                            Fight.StartFight(polyTarget.Guid);
                        }
                    }

Same problem on vanilla and TBC - any ideas?