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();
 

proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PlayerEventListener.java

@@ -30,6 +30,7 @@ class PlayerEventListener {
         for(Integer compressXZ : event.getNeedLoadChunks()) {
             int[] xz = CompactedCoords.uncompressXZ(compressXZ);
             Chunk chunk = event.getPlayer().getWorld().getChunk(xz[0], xz[1]);
+            if (chunk == null) continue;
 
             ChunkDataPacket packet = new ChunkDataPacket();
             packet.setX(xz[0]);