Fix chunk yPos

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/v1_13/BukkitChunk_1_13.java

@@ -137,8 +137,7 @@ public class BukkitChunk_1_13 extends IntFaweChunk<Chunk, BukkitQueue_1_13> {
     }
 
     public ChunkSection copy(ChunkSection current) throws IllegalAccessException, InvocationTargetException, NoSuchFieldException {
-        int y = current.getYPosition();
-        ChunkSection newSection = new ChunkSection(y, current.getSkyLightArray() != null);
+        ChunkSection newSection = new ChunkSection(current.getYPosition(), current.getSkyLightArray() != null);
 
         // Copy light
         NibbleArray skyLight = current.getSkyLightArray();

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/v1_13/BukkitQueue_1_13.java

@@ -844,9 +844,9 @@ public class BukkitQueue_1_13 extends BukkitQueue_0<net.minecraft.server.v1_13_R
 
     public static ChunkSection newChunkSection(int y2, boolean flag, int[] blocks) {
         if (blocks == null) {
-            return new ChunkSection(y2, flag);
+            return new ChunkSection(y2 << 4, flag);
         } else {
-            ChunkSection section = new ChunkSection(y2, flag);
+            ChunkSection section = new ChunkSection(y2 << 4, flag);
 
             int[] blockToPalette = FaweCache.BLOCK_TO_PALETTE.get();
             int[] paletteToBlock = FaweCache.PALETTE_TO_BLOCK.get();