From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alfie Cleveland <alfeh@me.com>
Date: Tue, 27 Dec 2016 01:57:57 +0000
Subject: [PATCH] Properly fix item duplication bug

Credit to prplz for figuring out the real issue

diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 8eb9a96e879a28841fcc338ff5c90f86908414bc..eaa968b6d91160947235fad29d3b955b3ee149f3 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -2162,7 +2162,7 @@ public class ServerPlayer extends Player {
 
     @Override
     public boolean isImmobile() {
-        return super.isImmobile() || !this.getBukkitEntity().isOnline();
+        return super.isImmobile() || (this.connection != null && this.connection.isDisconnected()); // Paper
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 192b0fae5ef200efefeb9727a68c17e3ca962027..28c768e758a10d2d109a4cd12779d6d40e9c43f8 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2846,7 +2846,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
     }
 
     public final boolean isDisconnected() {
-        return !this.player.joining && !this.connection.isConnected();
+        return (!this.player.joining && !this.connection.isConnected()) || this.processedDisconnect; // Paper
     }
     // CraftBukkit end