From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 14 Mar 2022 12:35:37 -0700
Subject: [PATCH] Don't allow vehicle movement from players while teleporting

Bring the vehicle move packet behavior in line with the
regular player move packet.

diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 1d0ef70f50810682cedf50754b1933e85f295e08..b10ead22bf26bab708ba46ef996c24836a2ed300 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -577,6 +577,12 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
         } else {
             Entity entity = this.player.getRootVehicle();
 
+            // Paper start
+            if (this.awaitingPositionFromClient != null || this.player.isImmobile() || entity.isRemoved()) {
+                return;
+            }
+            // Paper end
+
             if (entity != this.player && entity.getControllingPassenger() == this.player && entity == this.lastVehicle) {
                 ServerLevel worldserver = this.player.getLevel();
                 double d0 = entity.getX();final double fromX = d0; // Paper - OBFHELPER