diff --git a/core/src/main/java/com/volmit/iris/engine/object/IrisMerger.java b/core/src/main/java/com/volmit/iris/engine/object/IrisMerger.java
index 396a29699..8bb17b304 100644
--- a/core/src/main/java/com/volmit/iris/engine/object/IrisMerger.java
+++ b/core/src/main/java/com/volmit/iris/engine/object/IrisMerger.java
@@ -14,6 +14,7 @@ import com.volmit.iris.util.math.Position2;
 import com.volmit.iris.util.math.RollingSequence;
 import com.volmit.iris.util.parallel.BurstExecutor;
 import com.volmit.iris.util.parallel.MultiBurst;
+import com.volmit.iris.util.scheduling.J;
 import com.volmit.iris.util.scheduling.PrecisionStopwatch;
 import com.volmit.iris.util.scheduling.Queue;
 import com.volmit.iris.util.scheduling.ShurikenQueue;
@@ -76,7 +77,7 @@ public class IrisMerger {
      */
     @Deprecated
     public void generateVanillaUnderground(int cx, int cz, Engine engine) {
-        if (engine.getMemoryWorld() == null)
+        if (engine.getMemoryWorld() == null && useGenerator)
             throw new IllegalStateException("MemoryWorld is null. Ensure that it has been initialized.");
         if (engine.getWorld().realWorld() == null)
             return;
@@ -102,6 +103,9 @@ public class IrisMerger {
             Chunk chunk = bukkit.getChunkAt(cx, cz);
             Chunk ichunk = engine.getWorld().realWorld().getChunkAt(cx, cz);
 
+            if (!chunk.isLoaded())
+                J.s(chunk::load);
+
             int totalHeight = bukkit.getMaxHeight() - bukkit.getMinHeight();
             int minHeight = Math.abs(bukkit.getMinHeight());
 
@@ -198,7 +202,7 @@ public class IrisMerger {
                     }
                 }
             }
-
+            J.s(chunk::unload);
             mergeDuration.put(p.getMilliseconds());
             Iris.info("Vanilla merge average in: " + Form.duration(mergeDuration.getAverage(), 8));
         } catch (Exception e) {
@@ -256,10 +260,6 @@ public class IrisMerger {
         if (!chunk.isGenerated())
             throw new IllegalStateException("Chunk is not generated!");
 
-        if (!chunk.isLoaded()) {
-            chunk.load();
-        }
-
         int minHeight = chunk.getWorld().getMinHeight();
         int maxHeight = chunk.getWorld().getMaxHeight();
         int totalHeight = Math.abs(minHeight) + maxHeight;
diff --git a/core/src/main/java/com/volmit/iris/engine/platform/BukkitChunkGenerator.java b/core/src/main/java/com/volmit/iris/engine/platform/BukkitChunkGenerator.java
index f365cf8e7..45077f848 100644
--- a/core/src/main/java/com/volmit/iris/engine/platform/BukkitChunkGenerator.java
+++ b/core/src/main/java/com/volmit/iris/engine/platform/BukkitChunkGenerator.java
@@ -385,7 +385,7 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
 
     @EventHandler
     private void onChunkGeneration(ChunkLoadEvent event) {
-        if (engine == null ||!event.isNewChunk() || !engine.getWorld().realWorld().equals(event.getWorld()) || !engine.getDimension().isEnableExperimentalMerger() || engine.getMemoryWorld() == null)
+        if (engine == null ||!event.isNewChunk() || !engine.getWorld().realWorld().equals(event.getWorld()) || !engine.getDimension().isEnableExperimentalMerger())
             return;
         engine.getMerger().generateVanillaUnderground(event.getChunk().getX(), event.getChunk().getZ(), engine);
     }