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 fef0ce65c01fd56a0ed62de27e8d8457324bb295..7395cdcf618033f10482001cb9e2a7727e1e8bb2 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -2307,7 +2307,7 @@ 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 7e24a354a513a452aa1f7babb3ee402de8f6e72d..ba493c748c810e4ba452d59bcf8f1b7599f09b04 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -3186,7 +3186,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
     }
 
     public final boolean isDisconnected() {
-        return !this.player.joining && !this.connection.isConnected();
+        return (!this.player.joining && !this.connection.isConnected()) || this.processedDisconnect; // Paper
     }
     // CraftBukkit end