отсутствие чанка не должно генерировать exception's

core/src/main/java/mc/core/CoreEventListener.java

@@ -25,9 +25,11 @@ public class CoreEventListener {
 
         Chunk chunk;
         chunk = event.getPlayer().getWorld().getChunk(event.getOldLocation()); // Old chunk
+        if (chunk == null) return;
         int ccX = chunk.getX();
         int ccZ = chunk.getZ();
         chunk = event.getPlayer().getWorld().getChunk(event.getNewLocation()); // Next chunk
+        if (chunk == null) return;
         int ncX = chunk.getX();
         int ncZ = chunk.getZ();