diff --git a/src/game/Map.cpp b/src/game/Map.cpp
index 8aec468ab..79528f1cf 100644
--- a/src/game/Map.cpp
+++ b/src/game/Map.cpp
@@ -47,7 +47,7 @@ Map::~Map()
         sWorld.DecreaseScheduledScriptCount(m_scriptSchedule.size());
 
     if (m_persistentState)
-        m_persistentState->SetUsedByMapState(false);        // field pointer can be deleted after this
+        m_persistentState->SetUsedByMapState(NULL);         // field pointer can be deleted after this
 
     if(i_data)
     {
@@ -96,7 +96,7 @@ Map::Map(uint32 id, time_t expiry, uint32 InstanceId, uint8 SpawnMode)
     m_TerrainData->AddRef();
 
     m_persistentState = sMapPersistentStateMgr.AddPersistentState(i_mapEntry, GetInstanceId(), GetDifficulty(), 0, IsDungeon());
-    m_persistentState->SetUsedByMapState(true);
+    m_persistentState->SetUsedByMapState(this);
 }
 
 void Map::InitVisibilityDistance()
diff --git a/src/game/MapPersistentStateMgr.cpp b/src/game/MapPersistentStateMgr.cpp
index 3224d35f0..3f793119b 100644
--- a/src/game/MapPersistentStateMgr.cpp
+++ b/src/game/MapPersistentStateMgr.cpp
@@ -43,7 +43,7 @@ static uint32 resetEventTypeDelay[MAX_RESET_EVENT_TYPE] = { 0, 3600, 900, 300, 6
 
 MapPersistentState::MapPersistentState(uint16 MapId, uint32 InstanceId, Difficulty difficulty)
 : m_instanceid(InstanceId), m_mapid(MapId),
-  m_difficulty(difficulty), m_usedByMap(false)
+  m_difficulty(difficulty), m_usedByMap(NULL)
 {
 }
 
@@ -134,7 +134,7 @@ bool WorldPersistentState::CanBeUnload() const
 {
     // prevent unload if used for loaded map
     // prevent unload if respawn data still exist (will not prevent reset by scheduler)
-    return MapPersistentState::CanBeUnload() && HasRespawnTimes();
+    return MapPersistentState::CanBeUnload() && !HasRespawnTimes();
 }
 
 //== DungeonPersistentState functions =====================
@@ -161,7 +161,7 @@ DungeonPersistentState::~DungeonPersistentState()
 bool DungeonPersistentState::CanBeUnload() const
 {
     // prevent unload if any bounded groups or online bounded player still exists
-    return MapPersistentState::CanBeUnload() && HasBounds() && HasRespawnTimes();
+    return MapPersistentState::CanBeUnload() && !HasBounds() && !HasRespawnTimes();
 }
 
 /*
@@ -172,7 +172,7 @@ void DungeonPersistentState::SaveToDB()
     // state instance data too
     std::string data;
 
-    if (Map *map = sMapMgr.FindMap(GetMapId(), GetInstanceId()))
+    if (Map *map = GetMap())
     {
         InstanceData *iData = map->GetInstanceData();
         if(iData && iData->Save())
@@ -192,7 +192,7 @@ void DungeonPersistentState::DeleteRespawnTimes()
     CharacterDatabase.PExecute("DELETE FROM gameobject_respawn WHERE instance = '%u'", GetInstanceId());
     CharacterDatabase.CommitTransaction();
 
-    ClearRespawnTimes();
+    ClearRespawnTimes();                                    // state can be deleted at call if only respawn data prevent unload
 }
 
 void DungeonPersistentState::DeleteFromDB()
@@ -711,19 +711,25 @@ void MapPersistentStateManager::_ResetSave(PersistentStateMap& holder, Persisten
 
 void MapPersistentStateManager::_ResetInstance(uint32 mapid, uint32 instanceId)
 {
-    DEBUG_LOG("InstanceSaveMgr::_ResetInstance %u, %u", mapid, instanceId);
-    Map * iMap = sMapMgr.FindMap(mapid, instanceId);
-    if (!iMap || !iMap->Instanceable())
-        return;
+    DEBUG_LOG("MapPersistentStateManager::_ResetInstance %u, %u", mapid, instanceId);
 
     PersistentStateMap::iterator itr = m_instanceSaveByInstanceId.find(instanceId);
     if (itr != m_instanceSaveByInstanceId.end())
+    {
+        // delay reset until map unload for loaded map
+        if (Map * iMap = itr->second->GetMap())
+        {
+            MANGOS_ASSERT(iMap->IsDungeon());
+
+            ((DungeonMap*)iMap)->Reset(INSTANCE_RESET_RESPAWN_DELAY);
+            return;
+        }
+
         _ResetSave(m_instanceSaveByInstanceId, itr);
+    }
+
 
     DeleteInstanceFromDB(instanceId);                       // even if state not loaded
-
-    if (iMap->IsDungeon())
-        ((DungeonMap*)iMap)->Reset(INSTANCE_RESET_RESPAWN_DELAY);
 }
 
 void MapPersistentStateManager::_ResetOrWarnAll(uint32 mapid, Difficulty difficulty, bool warn, uint32 timeLeft)
diff --git a/src/game/MapPersistentStateMgr.h b/src/game/MapPersistentStateMgr.h
index 0a1f3eb82..b71ee1fcc 100644
--- a/src/game/MapPersistentStateMgr.h
+++ b/src/game/MapPersistentStateMgr.h
@@ -65,10 +65,11 @@ class MapPersistentState
         Difficulty GetDifficulty() const { return m_difficulty; }
 
         bool IsUsedByMap() const { return m_usedByMap; }
-        void SetUsedByMapState(bool state)
+        Map* GetMap() const { return m_usedByMap; }         // Can be NULL if map not loaded for persistent state
+        void SetUsedByMapState(Map* map)
         {
-            m_usedByMap = state;
-            if (!state)
+            m_usedByMap = map;
+            if (!map)
                 UnloadIfEmpty();
         }
 
@@ -90,7 +91,7 @@ class MapPersistentState
 
         bool UnloadIfEmpty();
         void ClearRespawnTimes();
-        bool HasRespawnTimes() const { return m_creatureRespawnTimes.empty() && m_goRespawnTimes.empty(); }
+        bool HasRespawnTimes() const { return !m_creatureRespawnTimes.empty() || !m_goRespawnTimes.empty(); }
 
     private:
         void SetCreatureRespawnTime(uint32 loguid, time_t t);
@@ -102,7 +103,7 @@ class MapPersistentState
         uint32 m_instanceid;
         uint32 m_mapid;
         Difficulty m_difficulty;
-        bool m_usedByMap;                                   // true when instance map loaded, lock MapPersistentState from unload
+        Map* m_usedByMap;                                   // NULL if map not loaded, non-NULL lock MapPersistentState from unload
 
         // persistent data
         RespawnTimes m_creatureRespawnTimes;                // lock MapPersistentState from unload, for example for temporary bound dungeon unload delay
@@ -184,7 +185,7 @@ class DungeonPersistentState : public MapPersistentState
 
     protected:
         bool CanBeUnload() const;                           // overwrite MapPersistentState::CanBeUnload
-        bool HasBounds() const { return m_playerList.empty() && m_groupList.empty(); }
+        bool HasBounds() const { return !m_playerList.empty() || !m_groupList.empty(); }
 
     private:
         typedef std::list<Player*> PlayerListType;
@@ -315,7 +316,7 @@ class MANGOS_DLL_DECL MapPersistentStateManager : public MaNGOS::Singleton<MapPe
     private:
         typedef UNORDERED_MAP<uint32 /*InstanceId or MapId*/, MapPersistentState*> PersistentStateMap;
 
-        //  called by scheduler
+        //  called by scheduler for DungeonPersistentStates
         void _ResetOrWarnAll(uint32 mapid, Difficulty difficulty, bool warn, uint32 timeleft);
         void _ResetInstance(uint32 mapid, uint32 instanceId);
         void _CleanupExpiredInstancesAtTime(time_t t);
diff --git a/src/game/SharedDefines.h b/src/game/SharedDefines.h
index 5a045b31d..32cd0d35e 100644
--- a/src/game/SharedDefines.h
+++ b/src/game/SharedDefines.h
@@ -2496,7 +2496,7 @@ enum InstanceResetMethod
     INSTANCE_RESET_GLOBAL,
     INSTANCE_RESET_GROUP_DISBAND,
     INSTANCE_RESET_GROUP_JOIN,
-    INSTANCE_RESET_RESPAWN_DELAY
+    INSTANCE_RESET_RESPAWN_DELAY                            // called from reset scheduler for request reset at map unload when map loaded at reset attempt for normal dungeon difficulty
 };
 
 // byte value (UNIT_FIELD_BYTES_2,3)
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index 7cdcdc6f6..e86841716 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "11136"
+ #define REVISION_NR "11137"
 #endif // __REVISION_NR_H__