--- a/net/minecraft/network/protocol/game/PacketPlayOutMultiBlockChange.java
+++ b/net/minecraft/network/protocol/game/PacketPlayOutMultiBlockChange.java
@@ -32,7 +32,7 @@
             short short0 = (Short) shortiterator.next();
 
             this.positions[j] = short0;
-            this.states[j] = chunksection.getType(SectionPosition.a(short0), SectionPosition.b(short0), SectionPosition.c(short0));
+            this.states[j] = (chunksection != null) ? chunksection.getType(SectionPosition.a(short0), SectionPosition.b(short0), SectionPosition.c(short0)) : net.minecraft.world.level.block.Blocks.AIR.getBlockData(); // CraftBukkit - SPIGOT-6076, Mojang bug when empty chunk section notified
         }
 
     }
