From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: mrhua269 <mrhua269@gmail.com>
Date: Fri, 28 Nov 2025 21:41:51 +0800
Subject: [PATCH] Prevent tamable animals check can teleport in an unloaded
 chunk

Based on the implementation of Canvas(https://github.com/CraftCanvasMC/Canvas/commit/af2aacb12cbccfd328dda4961167786f5d9dad53)

We need to check canTeleport for TamableAnimal but this logic could do the check in another tick region itself, so we need to prevent that. But it needs to push off this check to schedule to the correct tickregion, which needs costly rewriting of this logic, so we could simply allow the read when the owner's position is loaded

diff --git a/net/minecraft/world/entity/TamableAnimal.java b/net/minecraft/world/entity/TamableAnimal.java
index ff628c93d1cc3367272208efcb6b20b4a9999478..49b1af960534be93647cbde6341f9deb1b2dfab4 100644
--- a/net/minecraft/world/entity/TamableAnimal.java
+++ b/net/minecraft/world/entity/TamableAnimal.java
@@ -308,7 +308,8 @@ public abstract class TamableAnimal extends Animal implements OwnableEntity {
         if (pathTypeStatic != PathType.WALKABLE) {
             return false;
         } else {
-            BlockState blockState = this.level().getBlockState(pos.below());
+            BlockState blockState = this.level().getBlockStateIfLoaded(pos.below()); // Luminol - Prevent tamable animals check can teleport in an unloaded chunk
+            if (blockState == null) return false;  // Luminol - Prevent tamable animals check can teleport in an unloaded chunk
             if (!this.canFlyToOwner() && blockState.getBlock() instanceof LeavesBlock) {
                 return false;
             } else {