diff --git a/common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_13.java b/common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_13.java
index e6e265475..bba7a593b 100644
--- a/common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_13.java
+++ b/common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_13.java
@@ -5,6 +5,7 @@ import us.myles.ViaVersion.api.minecraft.chunks.ChunkSection;
 import us.myles.ViaVersion.api.type.Type;
 
 public class ChunkSectionType1_13 extends Type<ChunkSection> {
+    private static final int GLOBAL_PALETTE = 14;
 
     public ChunkSectionType1_13() {
         super("Chunk Section Type", ChunkSection.class);
@@ -16,18 +17,15 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
 
         // Reaad bits per block
         int bitsPerBlock = buffer.readUnsignedByte();
+        int originalBitsPerBlock = bitsPerBlock;
+
+        if (bitsPerBlock == 0 || bitsPerBlock > 8) {
+            bitsPerBlock = GLOBAL_PALETTE;
+        }
+
         long maxEntryValue = (1L << bitsPerBlock) - 1;
 
-        if (bitsPerBlock == 0) {
-            bitsPerBlock = 14;
-        }
-        if (bitsPerBlock < 4) {
-            bitsPerBlock = 4;
-        }
-        if (bitsPerBlock > 8) {
-            bitsPerBlock = 14;
-        }
-        int paletteLength = bitsPerBlock == 14 ? 0 : Type.VAR_INT.read(buffer);
+        int paletteLength = bitsPerBlock == GLOBAL_PALETTE ? 0 : Type.VAR_INT.read(buffer);
         // Read palette
         chunkSection.clearPalette();
         for (int i = 0; i < paletteLength; i++) {
@@ -37,6 +35,11 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
         // Read blocks
         long[] blockData = new long[Type.VAR_INT.read(buffer)];
         if (blockData.length > 0) {
+            int expectedLength = (int) Math.ceil(ChunkSection.SIZE * bitsPerBlock / 64.0);
+            if (blockData.length != expectedLength) {
+                throw new IllegalStateException("Block data length (" + blockData.length + ") does not match expected length (" + expectedLength + ")! bitsPerBlock=" + bitsPerBlock + ", originalBitsPerBlock=" + originalBitsPerBlock);
+            }
+
             for (int i = 0; i < blockData.length; i++) {
                 blockData[i] = buffer.readLong();
             }
@@ -53,7 +56,7 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
                     val = (int) ((blockData[startIndex] >>> startBitSubIndex | blockData[endIndex] << endBitSubIndex) & maxEntryValue);
                 }
 
-                if (bitsPerBlock == 14) {
+                if (bitsPerBlock == GLOBAL_PALETTE) {
                     chunkSection.setFlatBlock(i, val);
                 } else {
                     chunkSection.setPaletteIndex(i, val);
@@ -72,15 +75,14 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
         }
 
         if (bitsPerBlock > 8) {
-            bitsPerBlock = 14;
+            bitsPerBlock = GLOBAL_PALETTE;
         }
 
         long maxEntryValue = (1L << bitsPerBlock) - 1;
         buffer.writeByte(bitsPerBlock);
 
-
         // Write pallet (or not)
-        if (bitsPerBlock != 14) {
+        if (bitsPerBlock != GLOBAL_PALETTE) {
             Type.VAR_INT.write(buffer, chunkSection.getPaletteSize());
             for (int i = 0; i < chunkSection.getPaletteSize(); i++) {
                 Type.VAR_INT.write(buffer, chunkSection.getPaletteEntry(i));
@@ -91,7 +93,7 @@ public class ChunkSectionType1_13 extends Type<ChunkSection> {
         Type.VAR_INT.write(buffer, length);
         long[] data = new long[length];
         for (int index = 0; index < ChunkSection.SIZE; index++) {
-            int value = bitsPerBlock == 14 ? chunkSection.getFlatBlock(index) : chunkSection.getPaletteIndex(index);
+            int value = bitsPerBlock == GLOBAL_PALETTE ? chunkSection.getFlatBlock(index) : chunkSection.getPaletteIndex(index);
             int bitIndex = index * bitsPerBlock;
             int startIndex = bitIndex / 64;
             int endIndex = ((index + 1) * bitsPerBlock - 1) / 64;
diff --git a/common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_9.java b/common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_9.java
index 8a596e24a..8d11a517b 100644
--- a/common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_9.java
+++ b/common/src/main/java/us/myles/ViaVersion/api/type/types/version/ChunkSectionType1_9.java
@@ -1,11 +1,11 @@
 package us.myles.ViaVersion.api.type.types.version;
 
-import com.google.common.collect.BiMap;
 import io.netty.buffer.ByteBuf;
 import us.myles.ViaVersion.api.minecraft.chunks.ChunkSection;
 import us.myles.ViaVersion.api.type.Type;
 
 public class ChunkSectionType1_9 extends Type<ChunkSection> {
+    private static final int GLOBAL_PALETTE = 13;
 
     public ChunkSectionType1_9() {
         super("Chunk Section Type", ChunkSection.class);
@@ -17,22 +17,23 @@ public class ChunkSectionType1_9 extends Type<ChunkSection> {
 
         // Reaad bits per block
         int bitsPerBlock = buffer.readUnsignedByte();
+        int originalBitsPerBlock = bitsPerBlock;
         long maxEntryValue = (1L << bitsPerBlock) - 1;
 
         if (bitsPerBlock == 0) {
-            bitsPerBlock = 13;
+            bitsPerBlock = GLOBAL_PALETTE;
         }
         if (bitsPerBlock < 4) {
             bitsPerBlock = 4;
         }
         if (bitsPerBlock > 8) {
-            bitsPerBlock = 13;
+            bitsPerBlock = GLOBAL_PALETTE;
         }
         int paletteLength = Type.VAR_INT.read(buffer);
         // Read palette
         chunkSection.clearPalette();
         for (int i = 0; i < paletteLength; i++) {
-            if (bitsPerBlock != 13) {
+            if (bitsPerBlock != GLOBAL_PALETTE) {
                 chunkSection.addPaletteEntry(Type.VAR_INT.read(buffer));
             } else {
                 Type.VAR_INT.read(buffer);
@@ -42,6 +43,11 @@ public class ChunkSectionType1_9 extends Type<ChunkSection> {
         // Read blocks
         long[] blockData = new long[Type.VAR_INT.read(buffer)];
         if (blockData.length > 0) {
+            int expectedLength = (int) Math.ceil(ChunkSection.SIZE * bitsPerBlock / 64.0);
+            if (blockData.length != expectedLength) {
+                throw new IllegalStateException("Block data length (" + blockData.length + ") does not match expected length (" + expectedLength + ")! bitsPerBlock=" + bitsPerBlock + ", originalBitsPerBlock=" + originalBitsPerBlock);
+            }
+
             for (int i = 0; i < blockData.length; i++) {
                 blockData[i] = buffer.readLong();
             }
@@ -58,7 +64,7 @@ public class ChunkSectionType1_9 extends Type<ChunkSection> {
                     val = (int) ((blockData[startIndex] >>> startBitSubIndex | blockData[endIndex] << endBitSubIndex) & maxEntryValue);
                 }
 
-                if (bitsPerBlock == 13) {
+                if (bitsPerBlock == GLOBAL_PALETTE) {
                     chunkSection.setBlock(i, val >> 4, val & 0xF);
                 } else {
                     chunkSection.setPaletteIndex(i, val);
@@ -75,20 +81,29 @@ public class ChunkSectionType1_9 extends Type<ChunkSection> {
         while (chunkSection.getPaletteSize() > 1 << bitsPerBlock) {
             bitsPerBlock += 1;
         }
+
+        if (bitsPerBlock > 8) {
+            bitsPerBlock = GLOBAL_PALETTE;
+        }
+
         long maxEntryValue = (1L << bitsPerBlock) - 1;
         buffer.writeByte(bitsPerBlock);
 
-        // Write pallet
-        Type.VAR_INT.write(buffer, chunkSection.getPaletteSize());
-        for (int i = 0; i < chunkSection.getPaletteSize(); i++) {
-            Type.VAR_INT.write(buffer, chunkSection.getPaletteEntry(i));
+        // Write pallet (or not)
+        if (bitsPerBlock != GLOBAL_PALETTE) {
+            Type.VAR_INT.write(buffer, chunkSection.getPaletteSize());
+            for (int i = 0; i < chunkSection.getPaletteSize(); i++) {
+                Type.VAR_INT.write(buffer, chunkSection.getPaletteEntry(i));
+            }
+        } else {
+            Type.VAR_INT.write(buffer, 0);
         }
 
         int length = (int) Math.ceil(ChunkSection.SIZE * bitsPerBlock / 64.0);
         Type.VAR_INT.write(buffer, length);
         long[] data = new long[length];
         for (int index = 0; index < ChunkSection.SIZE; index++) {
-            int value = chunkSection.getPaletteIndex(index);
+            int value = bitsPerBlock == GLOBAL_PALETTE ? chunkSection.getFlatBlock(index) : chunkSection.getPaletteIndex(index);
             int bitIndex = index * bitsPerBlock;
             int startIndex = bitIndex / 64;
             int endIndex = ((index + 1) * bitsPerBlock - 1) / 64;