diff --git a/plugin/src/main/java/net/elytrium/limboapi/server/LimboImpl.java b/plugin/src/main/java/net/elytrium/limboapi/server/LimboImpl.java
index 8f38db2c..98786dd7 100644
--- a/plugin/src/main/java/net/elytrium/limboapi/server/LimboImpl.java
+++ b/plugin/src/main/java/net/elytrium/limboapi/server/LimboImpl.java
@@ -184,6 +184,8 @@ public LimboImpl(LimboAPI plugin, VirtualWorld world) {
   }
 
   protected void refresh() {
+    this.localDispose();
+
     this.built = true;
     JoinGamePacket legacyJoinGame = this.createLegacyJoinGamePacket();
     JoinGamePacket joinGame = this.createJoinGamePacket(ProtocolVersion.MINECRAFT_1_16);
@@ -729,6 +731,10 @@ public void dispose() {
   }
 
   private void localDispose() {
+    if (this.joinPackets == null) {
+      return;
+    }
+
     this.joinPackets.release();
     this.fastRejoinPackets.release();
     this.safeRejoinPackets.release();