From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Minecrell <minecrell@minecrell.net>
Date: Fri, 13 Jul 2018 14:54:43 +0200
Subject: [PATCH] Refresh player inventory when cancelling
 PlayerInteractEntityEvent

When interacting with entities with an item, the client will assume
the interaction is successful, and update the held item on the
client. However, if the interaction is cancelled on the server side,
the client will still mistakenly remove/replace the item in hand.

Examples for this are milking cows with a bucket or dyeing sheep.
The bucket is replaced with milk and the dye removed from inventory.

Refresh the player inventory when PlayerInteractEntityEvent is
cancelled to avoid this problem.

diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index a9b0f12a793c88258bf80b38d16c8b887d07df61..096a7f51684fa1939a6b1b973fbbffe58775f003 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2479,6 +2479,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
                             }
 
                             if (event.isCancelled()) {
+                                ServerGamePacketListenerImpl.this.player.containerMenu.sendAllDataToRemote(); // Paper - Refresh player inventory
                                 return;
                             }
                             // CraftBukkit end