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 1fb3e89d6f7f9d048f083e80b1259480d4e67ef9..cd79aa53ec49c80ee3ddf79b7161637e66b688fd 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -464,6 +464,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
             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 - Don't allow vehicle movement from players while teleporting
+            if (this.awaitingPositionFromClient != null || this.player.isImmobile() || entity.isRemoved()) {
+                return;
+            }
+            // Paper end - Don't allow vehicle movement from players while teleporting
 
             if (entity != this.player && entity.getControllingPassenger() == this.player && entity == this.lastVehicle) {
                 ServerLevel worldserver = this.player.serverLevel();