only try to extract if its already in the cache

src/main/java/appeng/fluids/helper/DualityFluidInterface.java

@@ -386,7 +386,7 @@ public class DualityFluidInterface implements IGridTickable, IStorageMonitorable
 				{
 					changed = true;
 				}
-				else
+				else if( this.gridProxy.getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) ).getStorageList().findPrecise( work ) != null )
 				{
 					final IAEFluidStack acquired = Platform.poweredExtraction( src, dest, work, this.interfaceRequestSource );
 					if( acquired != null )

src/main/java/appeng/helpers/DualityInterface.java

@@ -856,6 +856,11 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 					throw new GridAccessException();
 				}
 
+				IAEItemStack storedStack = this.gridProxy.getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) ).getStorageList().findPrecise( itemStack );
+				if( storedStack != null )
+				{
+					if( storedStack.getStackSize() > 0 )
+					{
 						final IAEItemStack acquired = Platform.poweredExtraction( src, this.destination, itemStack, this.interfaceRequestSource );
 						if( acquired != null )
 						{
@@ -866,11 +871,13 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 								throw new IllegalStateException( "bad attempt at managing inventory. ( addItems )" );
 							}
 						}
-				else
+					}
+					else if( storedStack.isCraftable() )
 					{
 						changed = this.handleCrafting( x, adaptor, itemStack ) || changed;
 					}
 				}
+			}
 			else if( itemStack.getStackSize() < 0 )
 			{
 				IAEItemStack toStore = itemStack.copy();