PaperMC/Spigot-Server-Patches/0390-Fix-spawning-of-hanging-entities-that-are-not-ItemFr.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MisterErwin <git@askarian.net>
Date: Wed, 30 Oct 2019 16:57:54 +0100
Subject: [PATCH] Fix spawning of hanging entities that are not ItemFrames and
 can not face UP or DOWN


diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index ee44171831350c7baf868b74ed9d5b8bf3ed6d4a..60e3a7422045148447a45685f66ed0ebb5172bf6 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1861,7 +1861,12 @@ public class CraftWorld implements World {
                 height = 9;
             }
 
-            BlockFace[] faces = new BlockFace[]{BlockFace.EAST, BlockFace.NORTH, BlockFace.WEST, BlockFace.SOUTH, BlockFace.UP, BlockFace.DOWN};
+            // Paper start - In addition to d65a2576e40e58c8e446b330febe6799d13a604f do not check UP/DOWN for non item frames
+            // BlockFace[] faces = new BlockFace[]{BlockFace.EAST, BlockFace.NORTH, BlockFace.WEST, BlockFace.SOUTH, BlockFace.UP, BlockFace.DOWN};
+            BlockFace[] faces = (ItemFrame.class.isAssignableFrom(clazz))
+                    ? new BlockFace[]{BlockFace.EAST, BlockFace.NORTH, BlockFace.WEST, BlockFace.SOUTH, BlockFace.UP, BlockFace.DOWN}
+                    : new BlockFace[]{BlockFace.EAST, BlockFace.NORTH, BlockFace.WEST, BlockFace.SOUTH};
+            // Paper end
             final BlockPosition pos = new BlockPosition(x, y, z);
             for (BlockFace dir : faces) {
                 IBlockData nmsBlock = world.getType(pos.shift(CraftBlock.blockFaceToNotch(dir)));