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/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 93a341618bf53900d143f429b94ea295dd973f2c..b7fe3a1119f927bf4fb4d5855f758a16a76ec779 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -920,7 +920,13 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player imple
             if (world instanceof ServerLevel) {
                 ServerLevel worldserver = (ServerLevel) world;
                 CompoundTag nbttagcompound = ((CompoundTag) nbt.get()).getCompound("RootVehicle");
+                Vec3 playerPos = this.position(); // Paper - force sync root vehicle to player position
                 Entity entity = EntityType.loadEntityRecursive(nbttagcompound.getCompound("Entity"), worldserver, EntitySpawnReason.LOAD, (entity1) -> {
+                    // Paper start - force sync root vehicle to player position
+                    if (entity1.distanceToSqr(ServerPlayer.this) > (5.0 * 5.0)) {
+                        entity1.setPosRaw(playerPos.x, playerPos.y, playerPos.z, true);
+                    }
+                    // Paper end - force sync root vehicle to player position
                     return !worldserver.addWithUUID(entity1, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.MOUNT) ? null : entity1; // CraftBukkit - decompile error // Paper - Entity#getEntitySpawnReason
                 });