Paper/patches/server/0787-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 3212a4cfb0c7e0003981097e813ebbe2601cdfec..900bf9fb40026cce1d869bb7ab1694e6cd354099 100644
--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
@@ -174,7 +174,7 @@ public class ServerEntity {
                 boolean flag4 = false;
                 boolean flag5 = false;
 
-                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);