diff --git a/.claude/analysis/EXTREME_LAG_ROOT_CAUSE_ANALYSIS.md b/.claude/analysis/EXTREME_LAG_ROOT_CAUSE_ANALYSIS.md
index 9d88cca17..628775d83 100644
--- a/.claude/analysis/EXTREME_LAG_ROOT_CAUSE_ANALYSIS.md
+++ b/.claude/analysis/EXTREME_LAG_ROOT_CAUSE_ANALYSIS.md
@@ -353,13 +353,36 @@ When 100 bots enter a map simultaneously, ALL 100 queue on exclusive lock.
 | GameSystemsManager Throttling | HIGH | ✅ FIXED | ~30x fewer manager updates |
 | SpatialGridManager Thundering Herd | MEDIUM | ✅ FIXED | Instant returns for existing grids |
 | Main Thread ThreadPool Blocking | HIGH | ⚠️ MITIGATED | Fixed by making workers faster |
-| CombatEventRouter | MEDIUM | ⏳ ACCEPTABLE | Already uses good patterns |
+| CombatEventRouter | MEDIUM | ✅ FIXED | Lock-free stats with atomics |
+| VMAP Repeated Load Attempts | HIGH | ✅ FIXED | Cache failed loads, no retries |
+| MMAP Repeated Load Attempts | HIGH | ✅ FIXED | Cache failed loads, no retries |
 | Unordered Mutexes | LOW | ⏳ DEFERRED | For future cleanup |
 
 **Total Build Status:** ✅ worldserver.exe compiled successfully
 
 ---
 
+## VMAP/MMAP LOAD CACHING FIX
+
+### Problem
+When maps reference VMAP/MMAP tiles that don't exist in client data (e.g., "8.0 Boost Experience",
+TWW dungeons), the server repeatedly attempts to load them on every grid access, causing:
+- Repeated file I/O operations
+- Log spam with warnings
+- Significant server slowdown
+
+### Solution
+Added `_vmapLoadFailed` and `_mmapLoadFailed` bitset caches to `TerrainInfo` class:
+- On first load failure, mark the grid as failed
+- Skip subsequent load attempts for the same grid
+- Changed log level from WARN to DEBUG for expected failures
+
+**File:** `src/server/game/Maps/TerrainMgr.h` and `TerrainMgr.cpp`
+
+**Expected Impact:** Near-instant returns for grids with missing map data
+
+---
+
 ## THREADING CONFIGURATION
 
 ### TrinityCore MapUpdate.Threads
diff --git a/src/server/game/Maps/TerrainMgr.cpp b/src/server/game/Maps/TerrainMgr.cpp
index 9f6e428e1..123fd7427 100644
--- a/src/server/game/Maps/TerrainMgr.cpp
+++ b/src/server/game/Maps/TerrainMgr.cpp
@@ -252,6 +252,10 @@ void TerrainInfo::LoadMMapImpl(uint32 instanceId, int32 gx, int32 gy)
     if (!DisableMgr::IsPathfindingEnabled(GetId()))
         return;
 
+    // PLAYERBOT FIX: Skip loading if we already know this tile failed (prevents repeated file access attempts)
+    if (_mmapLoadFailed[GetBitsetIndex(gx, gy)])
+        return;
+
     switch (MMAP::LoadResult mmapLoadResult = MMAP::MMapManager::instance()->loadMap(sWorld->GetDataPath(), GetId(), instanceId, gx, gy))
     {
         case MMAP::LoadResult::Success:
@@ -260,9 +264,19 @@ void TerrainInfo::LoadMMapImpl(uint32 instanceId, int32 gx, int32 gy)
         case MMAP::LoadResult::AlreadyLoaded:
             break;
         case MMAP::LoadResult::FileNotFound:
+            // PLAYERBOT FIX: Cache the failure to prevent repeated load attempts
+            _mmapLoadFailed[GetBitsetIndex(gx, gy)] = true;
             if (_parentTerrain)
                 break; // don't log tile not found errors for child maps
-            [[fallthrough]];
+            TC_LOG_DEBUG("mmaps.tiles", "MMAP not available name:{}, id:{}, x:{}, y:{} (mmap rep.: x:{}, y:{}) - will not retry", GetMapName(), GetId(), gx, gy, gx, gy);
+            break;
+        case MMAP::LoadResult::VersionMismatch:
+        case MMAP::LoadResult::ReadFromFileFailed:
+        case MMAP::LoadResult::LibraryError:
+            // PLAYERBOT FIX: Cache these failures too - they won't succeed on retry
+            _mmapLoadFailed[GetBitsetIndex(gx, gy)] = true;
+            TC_LOG_WARN("mmaps.tiles", "MMAP failed name:{}, id:{}, x:{}, y:{} (mmap rep.: x:{}, y:{}) result: {} - will not retry", GetMapName(), GetId(), gx, gy, gx, gy, AsUnderlyingType(mmapLoadResult));
+            break;
         default:
             TC_LOG_WARN("mmaps.tiles", "Could not load MMAP name:{}, id:{}, x:{}, y:{} (mmap rep.: x:{}, y:{}) result: {}", GetMapName(), GetId(), gx, gy, gx, gy, AsUnderlyingType(mmapLoadResult));
             break;
diff --git a/src/server/game/Maps/TerrainMgr.h b/src/server/game/Maps/TerrainMgr.h
index 08535ebe9..df47de23c 100644
--- a/src/server/game/Maps/TerrainMgr.h
+++ b/src/server/game/Maps/TerrainMgr.h
@@ -116,6 +116,7 @@ private:
     std::array<uint64, MAX_NUMBER_OF_GRIDS> _loadedGrids;
     std::bitset<MAX_NUMBER_OF_GRIDS * MAX_NUMBER_OF_GRIDS> _gridFileExists; // cache what grids are available for this map (not including parent/child maps)
     std::bitset<MAX_NUMBER_OF_GRIDS * MAX_NUMBER_OF_GRIDS> _vmapLoadFailed;  // PLAYERBOT FIX: cache failed VMAP loads to prevent repeated attempts
+    std::bitset<MAX_NUMBER_OF_GRIDS * MAX_NUMBER_OF_GRIDS> _mmapLoadFailed;  // PLAYERBOT FIX: cache failed MMAP loads to prevent repeated attempts
 
     static constexpr Milliseconds CleanupInterval = 1min;