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 ac4b66a4aa9e2f186ed5ff3c7d41a01152a9d283..e7b39f06707a62d26af7e183413e0301501d2ce0 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -2630,7 +2630,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player {
 
     @Override
     public boolean isImmobile() {
-        return super.isImmobile() || !this.getBukkitEntity().isOnline();
+        return super.isImmobile() || (this.connection != null && this.connection.isDisconnected()); // Paper - Fix duplication bugs
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
index 8520f0f2b4b4e758b2e2fae206b7fd818a6fa14f..73d40f768b6882062656cba30acc5f86f26d1a96 100644
--- a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
@@ -179,7 +179,7 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
     }
 
     public final boolean isDisconnected() {
-        return !this.player.joining && !this.connection.isConnected();
+        return (!this.player.joining && !this.connection.isConnected()) || this.processedDisconnect; // Paper - Fix duplication bugs
     }
     // CraftBukkit end