SPIGOT-611: Improve setBlock for tile->tile transitions

src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java

@@ -135,6 +135,10 @@ public class CraftBlock implements Block {
     public boolean setTypeIdAndData(final int type, final byte data, final boolean applyPhysics) {
         IBlockData blockData = getNMSBlock(type).fromLegacyData(data);
         BlockPosition position = new BlockPosition(x, y, z);
+
+        // SPIGOT-611: need to do this to prevent glitchiness. Easier to handle this here (like /setblock) than to fix weirdness in tile entity cleanup
+        chunk.getHandle().getWorld().setTypeAndData(position, Blocks.AIR.getBlockData(), 0);
+
         if (applyPhysics) {
             return chunk.getHandle().getWorld().setTypeAndData(position, blockData, 3);
         } else {