diff --git a/src/main/java/appeng/helpers/DualityInterface.java b/src/main/java/appeng/helpers/DualityInterface.java
index 9f7174fe2..d04dfa334 100644
--- a/src/main/java/appeng/helpers/DualityInterface.java
+++ b/src/main/java/appeng/helpers/DualityInterface.java
@@ -149,6 +149,7 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 	private int isWorking = -1;
 	private final Accessor accessor = new Accessor();
 	private GTCEInventoryAdaptor GTad;
+	EnumSet<EnumFacing> visitedFaces = EnumSet.noneOf( EnumFacing.class );
 
 	public DualityInterface( final AENetworkProxy networkProxy, final IInterfaceHost ih )
 	{
@@ -939,8 +940,12 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 		final World w = tile.getWorld();
 
 		final EnumSet<EnumFacing> possibleDirections = this.iHost.getTargets();
+
 		for( final EnumFacing s : possibleDirections )
 		{
+			if (visitedFaces.contains( s ))
+				continue;
+
 			final TileEntity te = w.getTileEntity( tile.getPos().offset( s ) );
 			if( te instanceof IInterfaceHost )
 			{
@@ -964,6 +969,7 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 				{
 					if( cm.pushPattern( patternDetails, table, s.getOpposite() ) )
 					{
+						visitedFaces.add( s );
 						return true;
 					}
 					continue;
@@ -1004,10 +1010,12 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 						}
 					}
 					this.pushItemsOut( possibleDirections );
+					visitedFaces.add( s );
 					return true;
 				}
 			}
 		}
+		visitedFaces.clear();
 
 		return false;
 	}
diff --git a/src/main/java/appeng/me/cluster/implementations/CraftingCPUCluster.java b/src/main/java/appeng/me/cluster/implementations/CraftingCPUCluster.java
index bf42c35de..e1f66746c 100644
--- a/src/main/java/appeng/me/cluster/implementations/CraftingCPUCluster.java
+++ b/src/main/java/appeng/me/cluster/implementations/CraftingCPUCluster.java
@@ -93,6 +93,7 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 	private final List<TileCraftingTile> storage = new ArrayList<>();
 	private final List<TileCraftingMonitorTile> status = new ArrayList<>();
 	private final HashMap<IMEMonitorHandlerReceiver<IAEItemStack>, Object> listeners = new HashMap<>();
+	private final Map<ICraftingPatternDetails,List<ICraftingMedium>> visitedMediums = new HashMap<>();
 	private ICraftingLink myLastLink;
 	private String myName = "";
 	private boolean isDestroyed = false;
@@ -653,6 +654,23 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 						continue;
 					}
 
+					if (visitedMediums.containsKey( details ))
+					{
+						if( visitedMediums.get( details ).containsAll( cc.getMediums( e.getKey() ) ) )
+						{
+							visitedMediums.clear();
+							visitedMediums.put( details, new ArrayList<>() );
+						}
+					}
+
+					visitedMediums.putIfAbsent( details, new ArrayList<>() );
+
+					if( visitedMediums.get( details ).contains( m ) )
+					{
+						continue;
+					}
+					visitedMediums.get( details ).add( m );
+
 					if( !m.isBusy() )
 					{
 						if( ic == null )