From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 3 Apr 2016 17:48:50 -0400
Subject: [PATCH] Fix Cancelling BlockPlaceEvent triggering physics


diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index c36032803e8b7e4a8537f02738075e1a6baed3b1..828f47c6aadb609402f7237f8c234d595f39c970 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -1372,11 +1372,13 @@ public class ServerLevel extends Level implements ServerEntityGetter, WorldGenLe
 
     @Override
     public void updateNeighborsAt(BlockPos pos, Block block) {
+        if (captureBlockStates) { return; } // Paper - Cancel all physics during placement
         this.updateNeighborsAt(pos, block, ExperimentalRedstoneUtils.initialOrientation(this, (Direction) null, (Direction) null));
     }
 
     @Override
     public void updateNeighborsAt(BlockPos pos, Block sourceBlock, @Nullable Orientation orientation) {
+        if (captureBlockStates) { return; } // Paper - Cancel all physics during placement
         this.neighborUpdater.updateNeighborsAtExceptFromFacing(pos, sourceBlock, (Direction) null, orientation);
     }