From f9882d938dfe10a599af85e4e17bab06157305cd Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Sat, 10 Nov 2018 05:15:21 +0000
Subject: [PATCH] Fix SpongeAbsortEvent handling

Only process drops when the block is actually going to be removed

diff --git a/src/main/java/net/minecraft/server/Block.java b/src/main/java/net/minecraft/server/Block.java
index 8d69a1556a..5b98c52559 100644
--- a/src/main/java/net/minecraft/server/Block.java
+++ b/src/main/java/net/minecraft/server/Block.java
@@ -473,7 +473,7 @@ public class Block implements IMaterial {
 
         iblockdata.dropNaturally(world, blockposition, ItemStack.a);
     }
-
+    public static void dropNaturally(IBlockData iblockdata, World world, BlockPosition blockposition, @Nullable TileEntity tileentity) { a(iblockdata, world, blockposition, tileentity); }
     public static void a(IBlockData iblockdata, World world, BlockPosition blockposition, @Nullable TileEntity tileentity) {
         if (world instanceof WorldServer) {
             a(iblockdata, (WorldServer) world, blockposition, tileentity).forEach((itemstack) -> {
diff --git a/src/main/java/net/minecraft/server/BlockSponge.java b/src/main/java/net/minecraft/server/BlockSponge.java
index 4e281ce6dd..6a64af71b9 100644
--- a/src/main/java/net/minecraft/server/BlockSponge.java
+++ b/src/main/java/net/minecraft/server/BlockSponge.java
@@ -113,8 +113,11 @@ public class BlockSponge extends Block {
                         // NOP
                     } else if (material == Material.WATER_PLANT || material == Material.REPLACEABLE_WATER_PLANT) {
                         TileEntity tileentity = iblockdata.getBlock().isTileEntity() ? world.getTileEntity(blockposition2) : null;
-
-                        a(iblockdata, world, blockposition2, tileentity);
+                        // Paper start
+                        if (block.getHandle().getMaterial() == Material.AIR) {
+                            dropNaturally(iblockdata, world, blockposition2, tileentity);
+                        }
+                        // Paper end
                     }
                 }
                 world.setTypeAndData(blockposition2, block.getHandle(), block.getFlag());
-- 
2.21.0