Folia/patches/server/0016-Sync-vehicle-position-to-player-position-on-player-d.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sun, 25 Jun 2023 13:57:30 -0700
Subject: [PATCH] Sync vehicle position to player position on player data load

This allows the player to be re-positioned before logging into
the world without causing thread checks to trip on Folia.

diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index cc0c75340cc366f07a5bf169b4de50ba2d9ce366..5b68d16ef099285482e66a714d2e2f4c54e011ab 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -516,7 +516,13 @@ public abstract class PlayerList {
         if (optional.isPresent() && ((CompoundTag) optional.get()).contains("RootVehicle", 10)) {
             CompoundTag nbttagcompound = ((CompoundTag) optional.get()).getCompound("RootVehicle");
             ServerLevel finalWorldServer = worldserver1; // CraftBukkit - decompile error
+            Vec3 playerPos = player.position(); // Paper - force sync root vehicle to player position
             Entity entity = EntityType.loadEntityRecursive(nbttagcompound.getCompound("Entity"), worldserver1, (entity1) -> {
+                // Paper start - force sync root vehicle to player position
+                if (entity1.distanceToSqr(player) > (5.0 * 5.0)) {
+                    entity1.setPosRaw(playerPos.x, playerPos.y, playerPos.z, true);
+                }
+                // Paper end - force sync root vehicle to player position
                 return !finalWorldServer.addWithUUID(entity1, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.MOUNT) ? null : entity1; // CraftBukkit - decompile error // Paper - Entity#getEntitySpawnReason
             });