Core/Loot: Only 3 items of the same entry can drop on 25 man raid difficulties and 1 everywhere else (non-raid or 10 man)

src/server/game/Entities/GameObject/GameObject.cpp

@@ -258,6 +258,10 @@ bool GameObject::Create(uint32 guidlow, uint32 name_id, Map* map, uint32 phaseMa
     LastUsedScriptID = GetGOInfo()->ScriptId;
     AIM_Initialize();
 
+    // Initialize loot duplicate count depending on raid difficulty
+    if (map->IsRaid() && map->GetSpawnMode() & RAID_DIFFICULTY_MASK_25MAN)
+        loot.maxDuplicates = 3;
+
     return true;
 }