From c4b1af2626f609e6bae4e19896b2df0ffaa63954 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 23 Jul 2018 22:18:31 -0400
Subject: [PATCH] Mark chunk dirty anytime entities change to guarantee it
 saves


diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 5f0329d0b1..c23891f73a 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -410,6 +410,7 @@ public class Chunk implements IChunkAccess {
         entity.chunkY = k;
         entity.chunkZ = this.loc.z;
         this.entitySlices[k].add(entity);
+        this.markDirty(); // Paper
     }
 
     @Override
@@ -436,6 +437,7 @@ public class Chunk implements IChunkAccess {
             return;
         }
         entityCounts.decrement(entity.getMinecraftKeyString());
+        this.markDirty(); // Paper
         // Paper end
     }
 
-- 
2.21.0