From 491235cd2a7ab7a9eaff4d02718c37d657b78167 Mon Sep 17 00:00:00 2001
From: Iceee <andrew@opticgaming.tv>
Date: Wed, 2 Mar 2016 12:03:23 -0600
Subject: [PATCH] Stop updating flowing block if material has changed


diff --git a/src/main/java/net/minecraft/server/BlockFlowing.java b/src/main/java/net/minecraft/server/BlockFlowing.java
index 62234a7c9..3b47253a4 100644
--- a/src/main/java/net/minecraft/server/BlockFlowing.java
+++ b/src/main/java/net/minecraft/server/BlockFlowing.java
@@ -90,6 +90,7 @@ public class BlockFlowing extends BlockFluids {
             this.f(world, blockposition, iblockdata);
         }
 
+        if (world.getType(blockposition).getBlock().getBlockData().getMaterial() != material) return; // Paper - Stop updating flowing block if material has changed
         org.bukkit.block.Block source = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()); // CraftBukkit
         IBlockData iblockdata2 = world.getType(blockposition.down());
 
-- 
2.17.0