Do not load chunks for light checks

sources/src/main/java/net/minecraft/server/World.java

@@ -699,7 +699,7 @@ public abstract class World implements IBlockAccess {
             if (blockposition.getY() >= 256) {
                 blockposition = new BlockPosition(blockposition.getX(), 255, blockposition.getZ());
             }
-
+            if (!this.isLoaded(blockposition)) return 0; // Paper
             return this.getChunkAtWorldCoords(blockposition).a(blockposition, 0);
         }
     }