From cc42f3b4545c00bfffe12d7b72cb770bfd639f31 Mon Sep 17 00:00:00 2001
From: VanJackal <v@njackal.com>
Date: Thu, 27 Aug 2026 20:29:17 -0500
Subject: [PATCH] add blockChanged check to updateNeighbours

---
 .../worldedit/coremc/internal/CoreMcWorldNativeAccess.java   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/worldedit-core-mc/src/main/java/com/sk89q/worldedit/coremc/internal/CoreMcWorldNativeAccess.java b/worldedit-core-mc/src/main/java/com/sk89q/worldedit/coremc/internal/CoreMcWorldNativeAccess.java
index 63466108b1..3b56a7e0d3 100644
--- a/worldedit-core-mc/src/main/java/com/sk89q/worldedit/coremc/internal/CoreMcWorldNativeAccess.java
+++ b/worldedit-core-mc/src/main/java/com/sk89q/worldedit/coremc/internal/CoreMcWorldNativeAccess.java
@@ -166,7 +166,10 @@ public void updateBlock(BlockPos pos, BlockState oldState, BlockState newState)
     @Override
     public void updateNeighbors(BlockPos pos, BlockState oldState, BlockState newState, int recursionLimit) {
         ServerLevel world = getWorld();
-        oldState.affectNeighborsAfterRemoval(world, pos, false);
+        boolean blockChanged = !oldState.is(newState.getBlock());
+        if (blockChanged) {
+            oldState.affectNeighborsAfterRemoval(world, pos, false);
+        }
         oldState.updateIndirectNeighbourShapes(world, pos, Block.UPDATE_CLIENTS, recursionLimit);
         newState.updateNeighbourShapes(world, pos, Block.UPDATE_CLIENTS, recursionLimit);
         newState.updateIndirectNeighbourShapes(world, pos, Block.UPDATE_CLIENTS, recursionLimit);