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 37a7d0189ccceb114b1f0f82d2ccb420e0b251cc..912c831ca4c52810ff16d4c8f4659d71347ddfa5 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -576,6 +576,11 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
             this.disconnect(Component.translatable("multiplayer.disconnect.invalid_vehicle_movement"), org.bukkit.event.player.PlayerKickEvent.Cause.INVALID_VEHICLE_MOVEMENT); // Paper - kick event cause
         } 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.serverLevel();