Paper/patches/server/0854-Fix-Entity-Position-Desync.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
Date: Thu, 23 Dec 2021 23:59:12 -0500
Subject: [PATCH] Fix Entity Position Desync

If entities were teleported in the first tick it would not be send to the client.

This excludes hanging entities, as this fix caused problematic behavior due to them having their own
position field.

diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
index ed7004cb5f5aa6c330d3783cb7b4bfeaeb69aba2..946cde51334568c62d9546254a8d4e5d46d95324 100644
--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
@@ -152,7 +152,7 @@ public class ServerEntity {
                 boolean flag2 = flag1 || this.tickCount % 60 == 0;
                 boolean flag3 = Math.abs(i - this.yRotp) >= 1 || Math.abs(j - this.xRotp) >= 1;
 
-                if (this.tickCount > 0 || this.entity instanceof AbstractArrow) {
+                if (!(this.entity instanceof net.minecraft.world.entity.decoration.HangingEntity) || this.tickCount > 0 || this.entity instanceof AbstractArrow) { // Paper - Always update position
                     long k = this.positionCodec.encodeX(vec3d);
                     long l = this.positionCodec.encodeY(vec3d);
                     long i1 = this.positionCodec.encodeZ(vec3d);