Sanity check for queued messages

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_19to1_18_2/packets/EntityPackets.java

@@ -277,12 +277,13 @@ public final class EntityPackets extends EntityRewriter<Protocol1_19To1_18_2> {
                     displayPreviewPacket.write(Type.BOOLEAN, false);
                     displayPreviewPacket.send(Protocol1_19To1_18_2.class);
 
-                    final QueuedMessagesStorage messagesStorage = wrapper.user().remove(QueuedMessagesStorage.class);
-                    if (messagesStorage == null) {
+                    final QueuedMessagesStorage messagesStorage = wrapper.user().get(QueuedMessagesStorage.class);
+                    if (messagesStorage.hasSent()) {
                         return;
                     }
 
                     final Queue<QueuedMessagesStorage.Message> messages = messagesStorage.messages();
+                    messagesStorage.setSent();
                     if (messages.isEmpty()) {
                         return;
                     }

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_19to1_18_2/storage/QueuedMessagesStorage.java

@@ -19,18 +19,27 @@ package com.viaversion.viaversion.protocols.protocol1_19to1_18_2.storage;
 
 import com.google.gson.JsonElement;
 import com.viaversion.viaversion.api.connection.StorableObject;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 import java.util.ArrayDeque;
 import java.util.Queue;
 
 public final class QueuedMessagesStorage implements StorableObject {
 
-    private final Queue<Message> messages = new ArrayDeque<>();
+    private Queue<Message> messages = new ArrayDeque<>();
 
-    public Queue<Message> messages() {
+    public @Nullable Queue<Message> messages() {
         return messages;
     }
 
+    public boolean hasSent() {
+        return messages == null;
+    }
+
+    public void setSent() {
+        messages = null;
+    }
+
     @Override
     public boolean clearOnServerSwitch() {
         return false;