[Невоспроизводимый] API GetInstanceDifficulty

[Animagus]

Тут нет ошибки, это особенности динамического изменения сложности, например код DBM:

-- hard coded party-mod support, yay :)
-- returns heroic for old instances that do not have a heroic mode (Naxx, Ulduar...)
function bossModPrototype:GetDifficulty() 
	local _, instanceType, difficulty, _, _, playerDifficulty, isDynamicInstance = GetInstanceInfo()
	if instanceType == "raid" and isDynamicInstance then -- "new" instance (ICC)
		if difficulty == 1 then -- 10 men
			return playerDifficulty == 0 and "normal10" or playerDifficulty == 1 and "heroic10" or "unknown"
		elseif difficulty == 2 then -- 25 men
			return playerDifficulty == 0 and "normal25" or playerDifficulty == 1 and "heroic25" or "unknown"
		end
	else -- support for "old" instances
		if GetInstanceDifficulty() == 1 then 
			return (self.modId == "DBM-Party-WotLK" or self.modId == "DBM-Party-BC") and "normal5" or 
			self.hasHeroic and "normal10" or "heroic10" 
		elseif GetInstanceDifficulty() == 2 then 
			return (self.modId == "DBM-Party-WotLK" or self.modId == "DBM-Party-BC") and "heroic5" or 
			self.hasHeroic and "normal25" or "heroic25" 
		elseif GetInstanceDifficulty() == 3 then 
			return "heroic10" 
		elseif GetInstanceDifficulty() == 4 then 
			return "heroic25" 
		end
	end
end