fix

components/Playground/index.tsx

@@ -58,14 +58,13 @@ const Playground = () => {
     setLastAppendedSystemMessage(systemMessage);
   };
 
-  useEffect(() => {
-    appendSystemMessage();
-  }, []);
-
   const modifiedHandleSubmit = async (e: FormEvent<HTMLFormElement>, chatRequestOptions?: ChatRequestOptions) => {
     e.preventDefault();
 
-    if (systemMessage !== lastAppendedSystemMessage) {
+    // Append the system message if:
+    // 1. This is the first message in the chat.
+    // 2. The system message has changed.
+    if (messages.length === 0 || systemMessage !== lastAppendedSystemMessage) {
       await appendSystemMessage();
     }