Fix

Signed-off-by: Chaoscaot <max@maxsp.de>

SpigotCore/SpigotCore_18/src/de/steamwar/techhider/ChunkHider18.java

@@ -93,7 +93,7 @@ public class ChunkHider18 implements ChunkHider {
     private static final Reflection.Method getKey = Reflection.getTypedMethod(IRegistry.class, null, MinecraftKey.class, Object.class);
     private static final Reflection.Method getName = Reflection.getTypedMethod(MinecraftKey.class, null, String.class);
     protected boolean tileEntityVisible(Set<String> hiddenBlockEntities, Object tile) {
-        return !hiddenBlockEntities.contains((String) getName.invoke(getKey.invoke(tileEntityTypes, entityType.get(tile))));
+        return !hiddenBlockEntities.contains(TechHider.normalizeBlockEntityId((String) getName.invoke(getKey.invoke(tileEntityTypes, entityType.get(tile)))));
     }
 
     private void blocks(SectionHider section) {

SpigotCore/SpigotCore_18/src/de/steamwar/techhider/ProtocolWrapper18.java

@@ -20,8 +20,11 @@
 package de.steamwar.techhider;
 
 import de.steamwar.Reflection;
+import de.steamwar.core.Core;
+import net.minecraft.core.IRegistry;
 import net.minecraft.core.SectionPosition;
 import net.minecraft.network.protocol.game.PacketPlayOutBlockBreak;
+import net.minecraft.resources.MinecraftKey;
 import net.minecraft.world.level.block.entity.TileEntitySign;
 import net.minecraft.world.level.block.entity.TileEntityTypes;
 import net.minecraft.world.level.block.state.IBlockData;
@@ -88,6 +91,14 @@ public class ProtocolWrapper18 implements ProtocolWrapper {
         return tileEntityType.get(packet) != signType;
     }
 
+    private static final IRegistry<?> tileEntityTypes = Reflection.getField(Core.getVersion() > 18 ? Reflection.getClass("net.minecraft.core.registries.BuiltInRegistries") : IRegistry.class, IRegistry.class, 0, TileEntityTypes.class).get(null);
+    private static final Reflection.Method getKey = Reflection.getTypedMethod(IRegistry.class, null, MinecraftKey.class, Object.class);
+    private static final Reflection.Method getName = Reflection.getTypedMethod(MinecraftKey.class, null, String.class);
+    @Override
+    public String tileEntityDataType(Object packet) {
+        return TechHider.normalizeBlockEntityId((String) getName.invoke(getKey.invoke(tileEntityTypes, tileEntityType.get(packet))));
+    }
+
     @Override
     public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, TechHider techHider) {
         return (p, packet) -> {

SpigotCore/SpigotCore_19/src/de/steamwar/techhider/ProtocolWrapper19.java

@@ -19,6 +19,7 @@
 
 package de.steamwar.techhider;
 
+import de.steamwar.Reflection;
 import org.bukkit.entity.Player;
 
 import java.util.function.BiFunction;
@@ -27,6 +28,7 @@ public class ProtocolWrapper19 extends ProtocolWrapper18 {
 
     @Override
     public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, TechHider techHider) {
-        return null;
+        Reflection.Field<?> blockBreakPosition = Reflection.getField(blockBreakPacket, TechHider.blockPosition, 0);
+        return (p, packet) -> techHider.getLocationEvaluator().checkBlockPos(p, blockBreakPosition.get(packet)) == TechHider.State.SKIP ? packet : null;
     }
 }

SpigotCore/SpigotCore_21/src/de/steamwar/techhider/ChunkHider21.java

@@ -25,16 +25,20 @@ import io.netty.buffer.Unpooled;
 import net.minecraft.network.protocol.game.ClientboundLevelChunkPacketData;
 import net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket;
 import net.minecraft.util.SimpleBitStorage;
+import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.entity.BlockEntityType;
 import org.bukkit.entity.Player;
 
 import java.util.List;
 import java.util.Set;
+import java.util.function.IntUnaryOperator;
 import java.util.function.BiFunction;
 import java.util.function.UnaryOperator;
 import java.util.stream.Collectors;
 
 public class ChunkHider21 implements ChunkHider {
+    private static final int DIRECT_BLOCK_BITS = Math.max(9, Integer.SIZE - Integer.numberOfLeadingZeros(Block.BLOCK_STATE_REGISTRY.size() - 1));
+
     @Override
     public Class<?> mapChunkPacket() {
         return ClientboundLevelChunkWithLightPacket.class;
@@ -96,33 +100,70 @@ public class ChunkHider21 implements ChunkHider {
     private static final Reflection.Method getKey = Reflection.getTypedMethod(registry, "getKey", resourceLocation, Object.class);
     private static final Reflection.Method getName = Reflection.getTypedMethod(resourceLocation, "getPath", String.class);
     protected boolean tileEntityVisible(Set<String> hiddenBlockEntities, Object tile) {
-        return !hiddenBlockEntities.contains(getName.invoke(getKey.invoke(nameField.get(null), entityType.get(tile))));
+        return !hiddenBlockEntities.contains(TechHider.normalizeBlockEntityId((String) getName.invoke(getKey.invoke(nameField.get(null), entityType.get(tile)))));
     }
 
     private void blocks(SectionHider section) {
-        section.copyBitsPerBlock();
+        int sourceBitsPerBlock = section.readBitsPerBlock();
 
-        boolean singleValued = section.getBitsPerBlock() == 0;
+        if(section.isSkipSection()) {
+            section.writeBitsPerBlock(sourceBitsPerBlock);
+            copyBlockStorage(section);
+            return;
+        }
+
+        boolean singleValued = sourceBitsPerBlock == 0;
         if (singleValued) {
             int value = ProtocolUtils.readVarInt(section.getIn());
-            ProtocolUtils.writeVarInt(section.getOut(), !section.isSkipSection() && section.getObfuscate().contains(value) ? section.getTarget() : value);
+            if(section.blockPrecise()) {
+                writeDirectBlocks(section, DIRECT_BLOCK_BITS, ignored -> value);
+            } else {
+                section.writeBitsPerBlock(sourceBitsPerBlock);
+                ProtocolUtils.writeVarInt(section.getOut(), section.getObfuscate().contains(value) ? section.getTarget() : value);
+            }
             return;
-        } else if (section.getBitsPerBlock() < 9) {
+        } else if (sourceBitsPerBlock < 9) {
+            if(section.blockPrecise()) {
+                int[] palette = section.readPalette();
+                SimpleBitStorage values = new SimpleBitStorage(sourceBitsPerBlock, 4096, section.readNewDataArray(4096));
+                writeDirectBlocks(section, DIRECT_BLOCK_BITS, pos -> palette[values.get(pos)]);
+                return;
+            }
+
+            section.writeBitsPerBlock(sourceBitsPerBlock);
             // Indirect (paletted) storage – only present when bitsPerBlock < 9 in 1.21+
             section.processPalette();
         }
 
-        if (section.isSkipSection() || (!section.blockPrecise() && section.isPaletted())) {
+        if (!section.blockPrecise() && section.isPaletted()) {
             section.skipNewDataArray(4096);
             return;
         }
 
-        SimpleBitStorage values = new SimpleBitStorage(section.getBitsPerBlock(), 4096, section.readNewDataArray(4096));
+        SimpleBitStorage values = new SimpleBitStorage(sourceBitsPerBlock, 4096, section.readNewDataArray(4096));
+        writeDirectBlocks(section, sourceBitsPerBlock, values::get);
+    }
+
+    private void copyBlockStorage(SectionHider section) {
+        if(section.getBitsPerBlock() == 0) {
+            section.copyVarInt();
+        } else {
+            if(section.getBitsPerBlock() < 9)
+                section.skipPalette();
+
+            section.skipNewDataArray(4096);
+        }
+    }
+
+    private void writeDirectBlocks(SectionHider section, int bitsPerBlock, IntUnaryOperator source) {
+        section.writeBitsPerBlock(bitsPerBlock);
+        SimpleBitStorage values = new SimpleBitStorage(bitsPerBlock, 4096);
 
         for (int y = 0; y < 16; y++) {
             for (int z = 0; z < 16; z++) {
                 for (int x = 0; x < 16; x++) {
                     int pos = (((y * 16) + z) * 16) + x;
+                    int value = source.applyAsInt(pos);
 
                     TechHider.State test = section.test(x, y, z);
 
@@ -130,15 +171,17 @@ public class ChunkHider21 implements ChunkHider {
                         case SKIP:
                             break;
                         case CHECK:
-                            if (!section.getObfuscate().contains(values.get(pos)))
+                            if (!section.getObfuscate().contains(value))
                                 break;
                         case HIDE:
-                            values.set(pos, section.getTarget());
+                            value = section.getTarget();
                             break;
                         case HIDE_AIR:
                         default:
-                            values.set(pos, section.getAir());
+                            value = section.getAir();
                     }
+
+                    values.set(pos, value);
                 }
             }
         }

SpigotCore/SpigotCore_21/src/de/steamwar/techhider/ProtocolWrapper21.java

@@ -0,0 +1,104 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2025 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.techhider;
+
+import de.steamwar.Reflection;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.SectionPos;
+import net.minecraft.network.protocol.game.ClientboundBlockDestructionPacket;
+import net.minecraft.world.level.block.entity.BlockEntityType;
+import net.minecraft.world.level.block.state.BlockState;
+import org.bukkit.entity.Player;
+
+import java.util.ArrayList;
+import java.util.function.BiFunction;
+
+public class ProtocolWrapper21 implements ProtocolWrapper {
+
+    private static final Reflection.Field<SectionPos> multiBlockChangeChunk = Reflection.getField(TechHider.multiBlockChangePacket, SectionPos.class, 0);
+    private static final Reflection.Field<short[]> multiBlockChangePos = Reflection.getField(TechHider.multiBlockChangePacket, short[].class, 0);
+    private static final Reflection.Field<BlockState[]> multiBlockChangeBlocks = Reflection.getField(TechHider.multiBlockChangePacket, BlockState[].class, 0);
+
+    @Override
+    public BiFunction<Player, Object, Object> multiBlockChangeGenerator(TechHider techHider) {
+        return (p, packet) -> {
+            TechHider.LocationEvaluator locationEvaluator = techHider.getLocationEvaluator();
+            SectionPos sectionPos = multiBlockChangeChunk.get(packet);
+            int chunkX = sectionPos.x();
+            int chunkY = sectionPos.y();
+            int chunkZ = sectionPos.z();
+            if(locationEvaluator.skipChunkSection(p, chunkX, chunkY, chunkZ))
+                return packet;
+
+            packet = TechHider.multiBlockChangeCloner.apply(packet);
+            final short[] oldPos = multiBlockChangePos.get(packet);
+            final BlockState[] oldBlocks = multiBlockChangeBlocks.get(packet);
+            ArrayList<Short> poss = new ArrayList<>(oldPos.length);
+            ArrayList<BlockState> blocks = new ArrayList<>(oldPos.length);
+            for(int i = 0; i < oldPos.length; i++) {
+                short pos = oldPos[i];
+                BlockState block = oldBlocks[i];
+                switch(locationEvaluator.check(p, 16*chunkX + SectionPos.sectionRelativeX(pos), 16*chunkY + SectionPos.sectionRelativeY(pos), 16*chunkZ + SectionPos.sectionRelativeZ(pos))) {
+                    case SKIP:
+                        poss.add(pos);
+                        blocks.add(block);
+                        break;
+                    case CHECK:
+                        poss.add(pos);
+                        blocks.add(techHider.iBlockDataHidden(block) ? (BlockState) techHider.getObfuscationTarget() : block);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            if(blocks.isEmpty())
+                return null;
+
+            short[] newPos = new short[poss.size()];
+            for(int i = 0; i < newPos.length; i++)
+                newPos[i] = poss.get(i);
+
+            multiBlockChangePos.set(packet, newPos);
+            multiBlockChangeBlocks.set(packet, blocks.toArray(new BlockState[0]));
+            return packet;
+        };
+    }
+
+    private static final Reflection.Field<BlockEntityType> tileEntityType = Reflection.getField(TechHider.tileEntityDataPacket, BlockEntityType.class, 0);
+
+    @Override
+    public boolean unfilteredTileEntityDataAction(Object packet) {
+        BlockEntityType type = tileEntityType.get(packet);
+        return type != BlockEntityType.SIGN && type != BlockEntityType.HANGING_SIGN;
+    }
+
+    @Override
+    public String tileEntityDataType(Object packet) {
+        return BlockEntityType.getKey(tileEntityType.get(packet)).getPath();
+    }
+
+    private static final Reflection.Field<BlockPos> blockBreakPosition = Reflection.getField(ClientboundBlockDestructionPacket.class, BlockPos.class, 0);
+
+    @Override
+    public BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, TechHider techHider) {
+        return (p, packet) -> techHider.getLocationEvaluator().checkBlockPos(p, blockBreakPosition.get(packet)) == TechHider.State.SKIP ? packet : null;
+    }
+}

SpigotCore/SpigotCore_9/src/de/steamwar/techhider/ChunkHider9.java

@@ -54,7 +54,7 @@ public class ChunkHider9 extends ChunkHider8 {
             packet = mapChunkCloner.apply(packet);
             Set<String> hiddenBlockEntities = techHider.getHiddenBlockEntities();
             mapChunkBlockEntities.set(packet, ((List<?>)mapChunkBlockEntities.get(packet)).stream().filter(
-                    nbttag -> !hiddenBlockEntities.contains((String) nbtTagGetString.invoke(nbttag, "id"))
+                    nbttag -> !hiddenBlockEntities.contains(TechHider.normalizeBlockEntityId((String) nbtTagGetString.invoke(nbttag, "id")))
             ).collect(Collectors.toList()));
 
             int primaryBitMask = mapChunkBitMask.get(packet);

SpigotCore/SpigotCore_Main/src/com/comphenix/tinyprotocol/TinyProtocol.java

@@ -23,6 +23,7 @@ import de.steamwar.Reflection;
 import de.steamwar.Reflection.Field;
 import de.steamwar.core.Core;
 import io.netty.channel.*;
+import io.netty.util.ReferenceCountUtil;
 import lombok.Getter;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
@@ -37,6 +38,7 @@ import org.bukkit.plugin.Plugin;
 
 import java.util.*;
 import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.BiFunction;
 import java.util.logging.Level;
 
@@ -57,17 +59,29 @@ public class TinyProtocol implements Listener {
 	public static final Field<List> networkManagers = Reflection.getField(serverConnection, List.class, 0, networkManager);
 
 	private static final String HANDLER_NAME = "tiny-steamwar";
+	private static final Class<?> bundlePacket = getOptionalClass("net.minecraft.network.protocol.BundlePacket");
+	private static final Class<?> clientboundBundlePacket = getOptionalClass("net.minecraft.network.protocol.game.ClientboundBundlePacket");
+	private static final Reflection.Method bundleSubPackets = bundlePacket == null ? null : Reflection.getTypedMethod(bundlePacket, null, Iterable.class);
+	private static final Reflection.Constructor clientboundBundleConstructor = clientboundBundlePacket == null ? null : Reflection.getConstructor(clientboundBundlePacket, Iterable.class);
 	public static final TinyProtocol instance = new TinyProtocol(Core.getInstance());
 
 	public static void init() {
 		//enforce init
 	}
 
+	private static Class<?> getOptionalClass(String className) {
+		try {
+			return Reflection.getClass(className);
+		} catch (IllegalArgumentException ignored) {
+			return null;
+		}
+	}
+
 	private final Plugin plugin;
 	private final List<?> connections;
 	private boolean closed;
 
-	private final Map<Class<?>, List<BiFunction<Player, Object, Object>>> packetFilters = new HashMap<>();
+	private final Map<Class<?>, List<BiFunction<Player, Object, Object>>> packetFilters = new ConcurrentHashMap<>();
 	@Getter
 	private final Map<Player, PacketInterceptor> playerInterceptors = new HashMap<>();
 
@@ -207,31 +221,51 @@ public class TinyProtocol implements Listener {
 
 		@Override
 		public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+			Object originalMsg = msg;
 			try {
 				msg = filterPacket(player, msg);
 			} catch (Exception e) {
 				plugin.getLogger().log(Level.SEVERE, "Error during incoming packet processing", e);
+				msg = null;
 			}
 
 			if (msg != null) {
 				super.channelRead(ctx, msg);
+			} else {
+				ReferenceCountUtil.release(originalMsg);
 			}
 		}
 
 		@Override
 		public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
+			Object originalMsg = msg;
 			try {
 				msg = filterPacket(player, msg);
 			} catch (Exception e) {
 				plugin.getLogger().log(Level.SEVERE, "Error during outgoing packet processing", e);
+				msg = null;
 			}
 
 			if (msg != null) {
 				super.write(ctx, msg, promise);
+			} else {
+				ReferenceCountUtil.release(originalMsg);
+				promise.trySuccess();
 			}
 		}
 
 		private Object filterPacket(Player player, Object packet) {
+			packet = filterSinglePacket(player, packet);
+			if(packet == null)
+				return null;
+
+			if(clientboundBundlePacket != null && clientboundBundlePacket.isInstance(packet))
+				return filterBundlePacket(player, packet);
+
+			return packet;
+		}
+
+		private Object filterSinglePacket(Player player, Object packet) {
 			List<BiFunction<Player, Object, Object>> filters = packetFilters.getOrDefault(packet.getClass(), Collections.emptyList());
 
 			for(BiFunction<Player, Object, Object> filter : filters) {
@@ -243,5 +277,33 @@ public class TinyProtocol implements Listener {
 
 			return packet;
 		}
+
+		private Object filterBundlePacket(Player player, Object packet) {
+			if(bundleSubPackets == null || clientboundBundleConstructor == null)
+				throw new IllegalStateException("Cannot filter bundled packet " + packet.getClass().getName());
+
+			ArrayList<Object> filteredPackets = new ArrayList<>();
+			boolean changed = false;
+			for(Object subPacket : (Iterable<?>) bundleSubPackets.invoke(packet)) {
+				Object filteredPacket = filterPacket(player, subPacket);
+				if(filteredPacket == null) {
+					changed = true;
+					continue;
+				}
+
+				if(filteredPacket != subPacket)
+					changed = true;
+
+				filteredPackets.add(filteredPacket);
+			}
+
+			if(!changed)
+				return packet;
+
+			if(filteredPackets.isEmpty())
+				return null;
+
+			return clientboundBundleConstructor.invoke(filteredPackets);
+		}
 	}
 }

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/ChunkHider.java

@@ -92,7 +92,17 @@ public interface ChunkHider {
         }
 
         public void copyBitsPerBlock() {
-            bitsPerBlock = in.readByte();
+            bitsPerBlock = in.readUnsignedByte();
+            out.writeByte(bitsPerBlock);
+        }
+
+        public int readBitsPerBlock() {
+            bitsPerBlock = in.readUnsignedByte();
+            return bitsPerBlock;
+        }
+
+        public void writeBitsPerBlock(int bitsPerBlock) {
+            this.bitsPerBlock = bitsPerBlock;
             out.writeByte(bitsPerBlock);
         }
 
@@ -108,6 +118,15 @@ public interface ChunkHider {
                 copyVarInt();
         }
 
+        public int[] readPalette() {
+            int paletteLength = ProtocolUtils.readVarInt(in);
+            int[] palette = new int[paletteLength];
+            for(int i = 0; i < paletteLength; i++)
+                palette[i] = ProtocolUtils.readVarInt(in);
+
+            return palette;
+        }
+
         public void processPalette() {
             if(skipSection) {
                 skipPalette();

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/ProtocolUtils.java

@@ -98,10 +98,7 @@ public class ProtocolUtils {
     }
 
     public static int posToChunk(int c){
-        int chunk = c / 16;
-        if(c < 0)
-            chunk--;
-        return chunk;
+        return Math.floorDiv(c, 16);
     }
 
     @Deprecated

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/ProtocolWrapper.java

@@ -31,6 +31,10 @@ public interface ProtocolWrapper {
 
     boolean unfilteredTileEntityDataAction(Object packet);
 
+    default String tileEntityDataType(Object packet) {
+        return null;
+    }
+
     BiFunction<Player, Object, Object> blockBreakHiderGenerator(Class<?> blockBreakPacket, TechHider techHider);
 
     BiFunction<Player, Object, Object> multiBlockChangeGenerator(TechHider techHider);

SpigotCore/SpigotCore_Main/src/de/steamwar/techhider/TechHider.java

@@ -27,6 +27,7 @@ import org.bukkit.Material;
 import org.bukkit.entity.Player;
 
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import java.util.function.BiFunction;
@@ -67,11 +68,12 @@ public class TechHider {
     private final Set<Integer> obfuscateIds;
     @Getter
     private final Set<String> hiddenBlockEntities;
+    private boolean enabled;
 
     public TechHider(LocationEvaluator locationEvaluator, Material obfuscationTarget, Set<Material> obfuscate, Set<String> hiddenBlockEntities) {
         this.locationEvaluator = locationEvaluator;
         this.obfuscateIds = obfuscate.stream().flatMap(m -> BlockIds.impl.materialToAllIds(m).stream()).collect(Collectors.toSet());
-        this.hiddenBlockEntities = hiddenBlockEntities;
+        this.hiddenBlockEntities = hiddenBlockEntities.stream().map(TechHider::normalizeBlockEntityId).collect(Collectors.toSet());
         this.obfuscationTarget = getBlockDataByBlock.invoke(getBlockByMaterial.invoke(null, obfuscationTarget));
         this.obfuscationTargetId = BlockIds.impl.materialToId(obfuscationTarget);
 
@@ -81,9 +83,11 @@ public class TechHider {
         techhiders.put(multiBlockChangePacket, ProtocolWrapper.impl.multiBlockChangeGenerator(this));
         techhiders.put(ChunkHider.impl.mapChunkPacket(), ChunkHider.impl.chunkHiderGenerator(this));
 
-        if(Core.getVersion() > 12 && Core.getVersion() < 19) {
+        if(Core.getVersion() > 12 && Core.getVersion() < 19 || Core.getVersion() >= 21) {
             Class<?> blockBreakClass = Reflection.getClass("net.minecraft.network.protocol.game.ClientboundBlockDestructionPacket");
-            techhiders.put(blockBreakClass, ProtocolWrapper.impl.blockBreakHiderGenerator(blockBreakClass, this));
+            BiFunction<Player, Object, Object> blockBreakHider = ProtocolWrapper.impl.blockBreakHiderGenerator(blockBreakClass, this);
+            if(blockBreakHider != null)
+                techhiders.put(blockBreakClass, blockBreakHider);
         }
 
         if(Core.getVersion() > 8){
@@ -94,10 +98,18 @@ public class TechHider {
     }
 
     public void enable() {
+        if(enabled)
+            return;
+
+        enabled = true;
         techhiders.forEach(TinyProtocol.instance::addFilter);
     }
 
     public void disable() {
+        if(!enabled)
+            return;
+
+        enabled = false;
         techhiders.forEach(TinyProtocol.instance::removeFilter);
     }
 
@@ -142,6 +154,8 @@ public class TechHider {
             case SKIP:
                 return packet;
             case CHECK:
+                if(isHiddenBlockEntity(ProtocolWrapper.impl.tileEntityDataType(packet)))
+                    return null;
                 if(ProtocolWrapper.impl.unfilteredTileEntityDataAction(packet))
                     return packet;
             default:
@@ -149,6 +163,19 @@ public class TechHider {
         }
     }
 
+    public boolean isHiddenBlockEntity(String id) {
+        return hiddenBlockEntities.contains(normalizeBlockEntityId(id));
+    }
+
+    public static String normalizeBlockEntityId(String id) {
+        if(id == null)
+            return "";
+
+        id = id.toLowerCase(Locale.ROOT);
+        int namespaceSeparator = id.indexOf(':');
+        return namespaceSeparator < 0 ? id : id.substring(namespaceSeparator + 1);
+    }
+
     public enum State {
         SKIP,
         CHECK,