diff --git a/CHANGELOG.md b/CHANGELOG.md
index c96ff6761..a2ff0f4a7 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ### 1.4.8
 - Fixed missing config categories in ingame config (raoulvdberge)
 - Fixed Controller not working anymore after changing redstone setting (raoulvdberge)
+- Fixed crash when placing or destroying network blocks (raoulvdberge)
 
 ### 1.4.7
 - Fixed bug where Portable Grid would dupe in inventory (raoulvdberge)
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/api/network/node/INetworkNodeManager.java b/src/main/java/com/raoulvdberge/refinedstorage/api/network/node/INetworkNodeManager.java
index aa03aed85..ee7b7b361 100644
--- a/src/main/java/com/raoulvdberge/refinedstorage/api/network/node/INetworkNodeManager.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/api/network/node/INetworkNodeManager.java
@@ -38,11 +38,6 @@ public interface INetworkNodeManager {
      */
     Collection<INetworkNode> all();
 
-    /**
-     * Clears all the nodes.
-     */
-    void clear();
-
     /**
      * Marks the network node manager for saving.
      */
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkNodeListener.java b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkNodeListener.java
index be8c62aa8..bf6bdac82 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkNodeListener.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkNodeListener.java
@@ -20,7 +20,7 @@ public class NetworkNodeListener {
 
             if (e.phase == TickEvent.Phase.END) {
                 for (INetworkNode node : API.instance().getNetworkNodeManager(e.world).all()) {
-                    if (e.world.isBlockLoaded(node.getPos())) {
+                    if (node.getWorld() != null && e.world.isBlockLoaded(node.getPos())) {
                         node.update();
                     }
                 }
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkNodeManager.java b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkNodeManager.java
index d8eb7146a..e27b9d185 100644
--- a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkNodeManager.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/NetworkNodeManager.java
@@ -12,8 +12,8 @@ import net.minecraftforge.common.util.Constants;
 
 import javax.annotation.Nullable;
 import java.util.Collection;
-import java.util.HashMap;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Function;
 
 public class NetworkNodeManager extends WorldSavedData implements INetworkNodeManager {
@@ -24,7 +24,7 @@ public class NetworkNodeManager extends WorldSavedData implements INetworkNodeMa
     private static final String NBT_NODE_DATA = "Data";
     private static final String NBT_NODE_POS = "Pos";
 
-    private Map<BlockPos, INetworkNode> nodes = new HashMap<>();
+    private Map<BlockPos, INetworkNode> nodes = new ConcurrentHashMap<>();
 
     public NetworkNodeManager(String s) {
         super(s);
@@ -32,7 +32,7 @@ public class NetworkNodeManager extends WorldSavedData implements INetworkNodeMa
 
     @Override
     public void readFromNBT(NBTTagCompound tag) {
-        clear();
+        Map<BlockPos, INetworkNode> newNodes = new ConcurrentHashMap<>();
 
         if (tag.hasKey(NBT_NODES)) {
             NBTTagList list = tag.getTagList(NBT_NODES, Constants.NBT.TAG_COMPOUND);
@@ -53,7 +53,7 @@ public class NetworkNodeManager extends WorldSavedData implements INetworkNodeMa
                 Function<NBTTagCompound, INetworkNode> factory = API.instance().getNetworkNodeRegistry().get(id);
 
                 if (factory != null) {
-                    setNode(pos, factory.apply(data));
+                    newNodes.put(pos, factory.apply(data));
 
                     RSUtils.debugLog("Node at " + pos + " read... (" + (++read) + "/" + toRead + ")");
                 } else {
@@ -65,6 +65,8 @@ public class NetworkNodeManager extends WorldSavedData implements INetworkNodeMa
         } else {
             RSUtils.debugLog("Cannot read nodes, as there is no 'nodes' tag on this WorldSavedData");
         }
+
+        this.nodes = newNodes;
     }
 
     @Override
@@ -117,13 +119,6 @@ public class NetworkNodeManager extends WorldSavedData implements INetworkNodeMa
         return nodes.values();
     }
 
-    @Override
-    public void clear() {
-        RSUtils.debugLog("Clearing all nodes!");
-
-        nodes.clear();
-    }
-
     @Override
     public void markForSaving() {
         markDirty();
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/tile/TileNode.java b/src/main/java/com/raoulvdberge/refinedstorage/tile/TileNode.java
index 106f07176..95a8e00c9 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/tile/TileNode.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/tile/TileNode.java
@@ -105,7 +105,7 @@ public abstract class TileNode<N extends NetworkNode> extends TileBase implement
         NetworkNode node = (NetworkNode) API.instance().getNetworkNodeManager(getWorld()).getNode(pos);
 
         if (node == null) {
-            throw new IllegalStateException("Node cannot be null!");
+            throw new IllegalStateException("Node cannot be null at " + pos + "!");
         }
 
         if (node.getContainer().world() == null) {