diff --git a/build.gradle.kts b/build.gradle.kts
index e632e98c9..8ab695fe1 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,7 @@
 plugins {
     `java-library`
+    // Ensure AP works in eclipse (no effect on other IDEs)
+    `eclipse`
     id("geyser.build-logic")
     id("io.freefair.lombok") version "6.3.0" apply false
 }
diff --git a/core/src/main/java/org/geysermc/geyser/level/chunk/GeyserChunkSection.java b/core/src/main/java/org/geysermc/geyser/level/chunk/GeyserChunkSection.java
index f3e6b8399..8a3534a8e 100644
--- a/core/src/main/java/org/geysermc/geyser/level/chunk/GeyserChunkSection.java
+++ b/core/src/main/java/org/geysermc/geyser/level/chunk/GeyserChunkSection.java
@@ -30,18 +30,20 @@ import org.cloudburstmc.protocol.common.util.Preconditions;
 
 public class GeyserChunkSection {
 
-    // Temporary reversion to v8 as it reduces the frequnecy of https://github.com/GeyserMC/Geyser/issues/4240
-    // This does not fully resolve the issue so a better solution is still needed
-    private static final int CHUNK_SECTION_VERSION = 8;
+    // As of at least 1.19.80
+    private static final int CHUNK_SECTION_VERSION = 9;
 
     private final BlockStorage[] storage;
+    // Counts up from 00 for y >= 0 and down from FF for y < 0
+    private final int subChunkIndex;
 
-    public GeyserChunkSection(int airBlockId) {
-        this(new BlockStorage[]{new BlockStorage(airBlockId), new BlockStorage(airBlockId)});
+    public GeyserChunkSection(int airBlockId, int subChunkIndex) {
+        this(new BlockStorage[]{new BlockStorage(airBlockId), new BlockStorage(airBlockId)}, subChunkIndex);
     }
 
-    public GeyserChunkSection(BlockStorage[] storage) {
+    public GeyserChunkSection(BlockStorage[] storage, int subChunkIndex) {
         this.storage = storage;
+        this.subChunkIndex = subChunkIndex;
     }
 
     public int getFullBlock(int x, int y, int z, int layer) {
@@ -60,6 +62,7 @@ public class GeyserChunkSection {
         buffer.writeByte(CHUNK_SECTION_VERSION);
         buffer.writeByte(this.storage.length);
         // Required for chunk version 9+
+        buffer.writeByte(this.subChunkIndex);
         for (BlockStorage blockStorage : this.storage) {
             blockStorage.writeToNetwork(buffer);
         }
@@ -86,12 +89,12 @@ public class GeyserChunkSection {
         return true;
     }
 
-    public GeyserChunkSection copy() {
+    public GeyserChunkSection copy(int subChunkIndex) {
         BlockStorage[] storage = new BlockStorage[this.storage.length];
         for (int i = 0; i < storage.length; i++) {
             storage[i] = this.storage[i].copy();
         }
-        return new GeyserChunkSection(storage);
+        return new GeyserChunkSection(storage, subChunkIndex);
     }
 
     public static int blockPosition(int x, int y, int z) {
diff --git a/core/src/main/java/org/geysermc/geyser/registry/populator/BlockRegistryPopulator.java b/core/src/main/java/org/geysermc/geyser/registry/populator/BlockRegistryPopulator.java
index 265c6b1f7..e3f4e685d 100644
--- a/core/src/main/java/org/geysermc/geyser/registry/populator/BlockRegistryPopulator.java
+++ b/core/src/main/java/org/geysermc/geyser/registry/populator/BlockRegistryPopulator.java
@@ -221,6 +221,7 @@ public final class BlockRegistryPopulator {
 
             GeyserBedrockBlock airDefinition = null;
             BlockDefinition commandBlockDefinition = null;
+            BlockDefinition mobSpawnerBlockDefinition = null;
             BlockDefinition waterDefinition = null;
             BlockDefinition movingBlockDefinition = null;
             Iterator<Map.Entry<String, JsonNode>> blocksIterator = BLOCKS_JSON.fields();
@@ -269,6 +270,7 @@ public final class BlockRegistryPopulator {
                     case "minecraft:air" -> airDefinition = bedrockDefinition;
                     case "minecraft:water[level=0]" -> waterDefinition = bedrockDefinition;
                     case "minecraft:command_block[conditional=false,facing=north]" -> commandBlockDefinition = bedrockDefinition;
+                    case "minecraft:spawner" -> mobSpawnerBlockDefinition = bedrockDefinition;
                     case "minecraft:moving_piston[facing=north,type=normal]" -> movingBlockDefinition = bedrockDefinition;
                 }
 
@@ -298,9 +300,13 @@ public final class BlockRegistryPopulator {
             if (commandBlockDefinition == null) {
                 throw new AssertionError("Unable to find command block in palette");
             }
-
             builder.commandBlock(commandBlockDefinition);
 
+            if (mobSpawnerBlockDefinition == null) {
+                throw new AssertionError("Unable to find mob spawner block in palette");
+            }
+            builder.mobSpawnerBlock(mobSpawnerBlockDefinition);
+
             if (waterDefinition  == null) {
                 throw new AssertionError("Unable to find water in palette");
             }
diff --git a/core/src/main/java/org/geysermc/geyser/registry/type/BlockMappings.java b/core/src/main/java/org/geysermc/geyser/registry/type/BlockMappings.java
index 80be3fbce..3d06cecac 100644
--- a/core/src/main/java/org/geysermc/geyser/registry/type/BlockMappings.java
+++ b/core/src/main/java/org/geysermc/geyser/registry/type/BlockMappings.java
@@ -54,6 +54,7 @@ public class BlockMappings implements DefinitionRegistry<GeyserBedrockBlock> {
     int[] remappedVanillaIds;
 
     BlockDefinition commandBlock;
+    BlockDefinition mobSpawnerBlock;
 
     Map<NbtMap, BlockDefinition> itemFrames;
     Map<String, NbtMap> flowerPotBlocks;
diff --git a/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/BlockEntityTranslator.java b/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/BlockEntityTranslator.java
index b89a2a547..7566e0d90 100644
--- a/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/BlockEntityTranslator.java
+++ b/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/BlockEntityTranslator.java
@@ -30,6 +30,7 @@ import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import com.github.steveice10.opennbt.tag.builtin.Tag;
 import org.cloudburstmc.nbt.NbtMap;
 import org.cloudburstmc.nbt.NbtMapBuilder;
+import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.geyser.util.BlockEntityUtils;
 
 /**
@@ -41,7 +42,7 @@ public abstract class BlockEntityTranslator {
 
     public abstract void translateTag(NbtMapBuilder builder, CompoundTag tag, int blockState);
 
-    public NbtMap getBlockEntityTag(BlockEntityType type, int x, int y, int z, CompoundTag tag, int blockState) {
+    public NbtMap getBlockEntityTag(GeyserSession session, BlockEntityType type, int x, int y, int z, CompoundTag tag, int blockState) {
         NbtMapBuilder tagBuilder = getConstantBedrockTag(BlockEntityUtils.getBedrockBlockEntityId(type), x, y, z);
         translateTag(tagBuilder, tag, blockState);
         return tagBuilder.build();
diff --git a/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/SpawnerBlockEntityTranslator.java b/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/SpawnerBlockEntityTranslator.java
index d1af70d8d..0aa8af279 100644
--- a/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/SpawnerBlockEntityTranslator.java
+++ b/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/SpawnerBlockEntityTranslator.java
@@ -29,12 +29,44 @@ import com.github.steveice10.mc.protocol.data.game.level.block.BlockEntityType;
 import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import com.github.steveice10.opennbt.tag.builtin.StringTag;
 import com.github.steveice10.opennbt.tag.builtin.Tag;
+import org.cloudburstmc.math.vector.Vector3i;
+import org.cloudburstmc.nbt.NbtMap;
 import org.cloudburstmc.nbt.NbtMapBuilder;
+import org.cloudburstmc.protocol.bedrock.packet.UpdateBlockPacket;
 import org.geysermc.geyser.entity.EntityDefinition;
 import org.geysermc.geyser.registry.Registries;
+import org.geysermc.geyser.session.GeyserSession;
 
 @BlockEntity(type = BlockEntityType.MOB_SPAWNER)
 public class SpawnerBlockEntityTranslator extends BlockEntityTranslator {
+
+    @Override
+    public NbtMap getBlockEntityTag(GeyserSession session, BlockEntityType type, int x, int y, int z, CompoundTag tag, int blockState) {
+        // Sending an empty EntityIdentifier to empty the spawner is ignored by the client, so we send a whole new spawner!
+        // Fixes https://github.com/GeyserMC/Geyser/issues/4214
+        CompoundTag spawnData = tag.get("SpawnData");
+        if (spawnData != null) {
+            CompoundTag entityTag = spawnData.get("entity");
+            if (entityTag.isEmpty()) {
+                Vector3i position = Vector3i.from(x, y, z);
+                // Set to air and back to reset the spawner - "just" updating the spawner doesn't work
+                UpdateBlockPacket emptyBlockPacket = new UpdateBlockPacket();
+                emptyBlockPacket.setDataLayer(0);
+                emptyBlockPacket.setBlockPosition(position);
+                emptyBlockPacket.setDefinition(session.getBlockMappings().getBedrockAir());
+                session.sendUpstreamPacket(emptyBlockPacket);
+
+                UpdateBlockPacket spawnerBlockPacket = new UpdateBlockPacket();
+                spawnerBlockPacket.setDataLayer(0);
+                spawnerBlockPacket.setBlockPosition(position);
+                spawnerBlockPacket.setDefinition(session.getBlockMappings().getMobSpawnerBlock());
+                session.sendUpstreamPacket(spawnerBlockPacket);
+            }
+        }
+
+        return super.getBlockEntityTag(session, type, x, y, z, tag, blockState);
+    }
+
     @Override
     public void translateTag(NbtMapBuilder builder, CompoundTag tag, int blockState) {
         Tag current;
@@ -69,8 +101,8 @@ public class SpawnerBlockEntityTranslator extends BlockEntityTranslator {
 
         CompoundTag spawnData = tag.get("SpawnData");
         if (spawnData != null) {
-            StringTag idTag = ((CompoundTag) spawnData.get("entity")).get("id");
-            if (idTag != null) {
+            CompoundTag entityTag = spawnData.get("entity");
+            if (entityTag.get("id") instanceof StringTag idTag) {
                 // As of 1.19.3, spawners can be empty
                 String entityId = idTag.getValue();
                 builder.put("EntityIdentifier", entityId);
diff --git a/core/src/main/java/org/geysermc/geyser/translator/protocol/java/JavaUpdateRecipesTranslator.java b/core/src/main/java/org/geysermc/geyser/translator/protocol/java/JavaUpdateRecipesTranslator.java
index 5beb1a201..71cb6019a 100644
--- a/core/src/main/java/org/geysermc/geyser/translator/protocol/java/JavaUpdateRecipesTranslator.java
+++ b/core/src/main/java/org/geysermc/geyser/translator/protocol/java/JavaUpdateRecipesTranslator.java
@@ -337,7 +337,7 @@ public class JavaUpdateRecipesTranslator extends PacketTranslator<ClientboundUpd
                     GroupedItem groupedItem = entry.getKey();
 
                     String recipeTag = RECIPE_TAGS.get(groupedItem.id.getIdentifier());
-                    if (recipeTag != null) {
+                    if (recipeTag != null && ingredients.length > 1) {
                         optionSet.add(new ItemDescriptorWithCount(new ItemTagDescriptor(recipeTag), groupedItem.count));
                         continue;
                     }
diff --git a/core/src/main/java/org/geysermc/geyser/translator/protocol/java/level/JavaBlockEntityDataTranslator.java b/core/src/main/java/org/geysermc/geyser/translator/protocol/java/level/JavaBlockEntityDataTranslator.java
index b86882d84..c67a6dee4 100644
--- a/core/src/main/java/org/geysermc/geyser/translator/protocol/java/level/JavaBlockEntityDataTranslator.java
+++ b/core/src/main/java/org/geysermc/geyser/translator/protocol/java/level/JavaBlockEntityDataTranslator.java
@@ -62,7 +62,7 @@ public class JavaBlockEntityDataTranslator extends PacketTranslator<ClientboundB
         }
 
         Vector3i position = packet.getPosition();
-        BlockEntityUtils.updateBlockEntity(session, translator.getBlockEntityTag(type, position.getX(), position.getY(), position.getZ(),
+        BlockEntityUtils.updateBlockEntity(session, translator.getBlockEntityTag(session, type, position.getX(), position.getY(), position.getZ(),
                 packet.getNbt(), blockState), packet.getPosition());
         // Check for custom skulls.
         boolean hasCustomHeadBlock = false;
@@ -80,7 +80,7 @@ public class JavaBlockEntityDataTranslator extends PacketTranslator<ClientboundB
             }
         }
         if (!hasCustomHeadBlock) {
-            BlockEntityUtils.updateBlockEntity(session, translator.getBlockEntityTag(type, position.getX(), position.getY(), position.getZ(),
+            BlockEntityUtils.updateBlockEntity(session, translator.getBlockEntityTag(session, type, position.getX(), position.getY(), position.getZ(),
                     packet.getNbt(), blockState), packet.getPosition());
         }
 
diff --git a/core/src/main/java/org/geysermc/geyser/translator/protocol/java/level/JavaLevelChunkWithLightTranslator.java b/core/src/main/java/org/geysermc/geyser/translator/protocol/java/level/JavaLevelChunkWithLightTranslator.java
index 85eec40e0..19c587bf8 100644
--- a/core/src/main/java/org/geysermc/geyser/translator/protocol/java/level/JavaLevelChunkWithLightTranslator.java
+++ b/core/src/main/java/org/geysermc/geyser/translator/protocol/java/level/JavaLevelChunkWithLightTranslator.java
@@ -78,7 +78,8 @@ import java.util.BitSet;
 import java.util.List;
 import java.util.Map;
 
-import static org.geysermc.geyser.util.ChunkUtils.SERIALIZED_CHUNK_DATA;
+import static org.geysermc.geyser.util.ChunkUtils.EMPTY_BLOCK_STORAGE;
+import static org.geysermc.geyser.util.ChunkUtils.EMPTY_CHUNK_SECTION_SIZE;
 import static org.geysermc.geyser.util.ChunkUtils.indexYZXtoXZY;
 
 @Translator(packet = ClientboundLevelChunkWithLightPacket.class)
@@ -127,6 +128,7 @@ public class JavaLevelChunkWithLightTranslator extends PacketTranslator<Clientbo
                 boolean thisExtendedCollisionNextSection = false;
 
                 int bedrockSectionY = sectionY + (yOffset - (bedrockDimension.minY() >> 4));
+                int subChunkIndex = sectionY + yOffset;
                 if (bedrockSectionY < 0 || maxBedrockSectionY < bedrockSectionY) {
                     // Ignore this chunk section since it goes outside the bounds accepted by the Bedrock client
                     if (useExtendedCollisions) {
@@ -154,7 +156,7 @@ public class JavaLevelChunkWithLightTranslator extends PacketTranslator<Clientbo
                             }
     
                             BlockStorage[] layers = new BlockStorage[]{ layer0 };
-                            sections[bedrockSectionY] = new GeyserChunkSection(layers);
+                            sections[bedrockSectionY] = new GeyserChunkSection(layers, subChunkIndex);
                         }
                         EXTENDED_COLLISIONS_STORAGE.get().clear();
                         extendedCollisionNextSection = false;
@@ -167,7 +169,7 @@ public class JavaLevelChunkWithLightTranslator extends PacketTranslator<Clientbo
 
                 if (javaPalette instanceof GlobalPalette) {
                     // As this is the global palette, simply iterate through the whole chunk section once
-                    GeyserChunkSection section = new GeyserChunkSection(session.getBlockMappings().getBedrockAir().getRuntimeId());
+                    GeyserChunkSection section = new GeyserChunkSection(session.getBlockMappings().getBedrockAir().getRuntimeId(), subChunkIndex);
                     for (int yzx = 0; yzx < BlockStorage.SIZE; yzx++) {
                         int javaId = javaData.get(yzx);
                         int bedrockId = session.getBlockMappings().getBedrockBlockId(javaId);
@@ -217,9 +219,9 @@ public class JavaLevelChunkWithLightTranslator extends PacketTranslator<Clientbo
 
                     if (BlockRegistries.WATERLOGGED.get().get(javaId)) {
                         BlockStorage waterlogged = new BlockStorage(SingletonBitArray.INSTANCE, IntLists.singleton(session.getBlockMappings().getBedrockWater().getRuntimeId()));
-                        sections[bedrockSectionY] = new GeyserChunkSection(new BlockStorage[] {blockStorage, waterlogged});
+                        sections[bedrockSectionY] = new GeyserChunkSection(new BlockStorage[] {blockStorage, waterlogged}, subChunkIndex);
                     } else {
-                        sections[bedrockSectionY] = new GeyserChunkSection(new BlockStorage[] {blockStorage});
+                        sections[bedrockSectionY] = new GeyserChunkSection(new BlockStorage[] {blockStorage}, subChunkIndex);
                     }
                     if (useExtendedCollisions) {
                         EXTENDED_COLLISIONS_STORAGE.get().clear();
@@ -378,7 +380,7 @@ public class JavaLevelChunkWithLightTranslator extends PacketTranslator<Clientbo
                     layers = new BlockStorage[]{ layer0, new BlockStorage(BitArrayVersion.V1.createArray(BlockStorage.SIZE, layer1Data), layer1Palette) };
                 }
 
-                sections[bedrockSectionY] = new GeyserChunkSection(layers);
+                sections[bedrockSectionY] = new GeyserChunkSection(layers, subChunkIndex);
                 extendedCollisionNextSection = thisExtendedCollisionNextSection;
             }
 
@@ -419,20 +421,21 @@ public class JavaLevelChunkWithLightTranslator extends PacketTranslator<Clientbo
                 }
 
                 BlockEntityTranslator blockEntityTranslator = BlockEntityUtils.getBlockEntityTranslator(type);
-                bedrockBlockEntities.add(blockEntityTranslator.getBlockEntityTag(type, x + chunkBlockX, y, z + chunkBlockZ, tag, blockState));
+                bedrockBlockEntities.add(blockEntityTranslator.getBlockEntityTag(session, type, x + chunkBlockX, y, z + chunkBlockZ, tag, blockState));
 
                 // Check for custom skulls
                 if (session.getPreferencesCache().showCustomSkulls() && type == BlockEntityType.SKULL && tag != null && tag.contains("SkullOwner")) {
                     BlockDefinition blockDefinition = SkullBlockEntityTranslator.translateSkull(session, tag, Vector3i.from(x + chunkBlockX, y, z + chunkBlockZ), blockState);
                     if (blockDefinition != null) {
                         int bedrockSectionY = (y >> 4) - (bedrockDimension.minY() >> 4);
+                        int subChunkIndex = (y >> 4) + (bedrockDimension.minY() >> 4);
                         if (0 <= bedrockSectionY && bedrockSectionY < maxBedrockSectionY) {
                             // Custom skull is in a section accepted by Bedrock
                             GeyserChunkSection bedrockSection = sections[bedrockSectionY];
                             IntList palette = bedrockSection.getBlockStorageArray()[0].getPalette();
                             if (palette instanceof IntImmutableList || palette instanceof IntLists.Singleton) {
                                 // TODO there has to be a better way to expand the palette .-.
-                                bedrockSection = bedrockSection.copy();
+                                bedrockSection = bedrockSection.copy(subChunkIndex);
                                 sections[bedrockSectionY] = bedrockSection;
                             }
                             bedrockSection.setFullBlock(x, y & 0xF, z, 0, blockDefinition.getRuntimeId());
@@ -458,7 +461,7 @@ public class JavaLevelChunkWithLightTranslator extends PacketTranslator<Clientbo
                 if (section != null) {
                     size += section.estimateNetworkSize();
                 } else {
-                    size += SERIALIZED_CHUNK_DATA.length;
+                    size += EMPTY_CHUNK_SECTION_SIZE;
                 }
             }
             size += ChunkUtils.EMPTY_BIOME_DATA.length * biomeCount;
@@ -472,7 +475,8 @@ public class JavaLevelChunkWithLightTranslator extends PacketTranslator<Clientbo
                 if (section != null) {
                     section.writeToNetwork(byteBuf);
                 } else {
-                    byteBuf.writeBytes(SERIALIZED_CHUNK_DATA);
+                    int subChunkIndex = (i + (bedrockDimension.minY() >> 4));
+                    new GeyserChunkSection(EMPTY_BLOCK_STORAGE, subChunkIndex).writeToNetwork(byteBuf);
                 }
             }
 
diff --git a/core/src/main/java/org/geysermc/geyser/util/ChunkUtils.java b/core/src/main/java/org/geysermc/geyser/util/ChunkUtils.java
index cded234f9..114a7b6de 100644
--- a/core/src/main/java/org/geysermc/geyser/util/ChunkUtils.java
+++ b/core/src/main/java/org/geysermc/geyser/util/ChunkUtils.java
@@ -54,19 +54,27 @@ import static org.geysermc.geyser.level.block.BlockStateValues.JAVA_AIR_ID;
 
 @UtilityClass
 public class ChunkUtils {
-    /**
-     * An empty subchunk.
-     */
-    public static final byte[] SERIALIZED_CHUNK_DATA;
+
     public static final byte[] EMPTY_BIOME_DATA;
 
+    public static final BlockStorage[] EMPTY_BLOCK_STORAGE;
+
+    public static final int EMPTY_CHUNK_SECTION_SIZE;
+
     static {
+        EMPTY_BLOCK_STORAGE = new BlockStorage[0];
+
         ByteBuf byteBuf = Unpooled.buffer();
         try {
-            new GeyserChunkSection(new BlockStorage[0])
+            new GeyserChunkSection(EMPTY_BLOCK_STORAGE, 0)
                     .writeToNetwork(byteBuf);
-            SERIALIZED_CHUNK_DATA = new byte[byteBuf.readableBytes()];
-            byteBuf.readBytes(SERIALIZED_CHUNK_DATA);
+
+            byte[] emptyChunkData = new byte[byteBuf.readableBytes()];
+            byteBuf.readBytes(emptyChunkData);
+
+            EMPTY_CHUNK_SECTION_SIZE = emptyChunkData.length;
+
+            emptyChunkData = null;
         } finally {
             byteBuf.release();
         }