Python: [AG-UI] After running the MCP tools, a warning appears on the screen

[TsukasaIshimura]

I am building a web app using Microsoft Agent Framework AG-UI and CopilotKit.
After running the MCP tools, a warning appears on the screen.Starting from agent-framework version 1.0.0b260116, this warning started appearing.
Warning: Run ended without emitting a terminal event.
It did not appear in version 1.0.0b260114.

Could you please look into this? Thank you.

Screenshots

Source code (Backend)

from __future__ import annotations

import logging
import os
from typing import Any

import uvicorn
from agent_framework import ChatAgent, MCPStreamableHTTPTool
from agent_framework.azure import AzureOpenAIChatClient
from agent_framework_ag_ui import (AgentFrameworkAgent,
                                   add_agent_framework_fastapi_endpoint)
from app.config import settings
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware


chat_client = AzureOpenAIChatClient(credential=AzureCliCredential())

app = FastAPI(title="CopilotKit + Microsoft Agent Framework (Python)")
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

get_datetime_mcp = MCPStreamableHTTPTool(
    name="get-datetime-mcp",
    url="http://localhost:8001/mcp",
)

base_agent = ChatAgent(
    name="MyAgent",
    instructions="You are a helpful AI Agent.",
    chat_client=chat_client,
    tools=[get_datetime_mcp],
)

add_agent_framework_fastapi_endpoint(
    app=app,
    agent=AgentFrameworkAgent(
        agent=base_agent,
        name="MyAgent",
        description="Helpful AI Agent",
    ),
    path="/api/v1/agents/my-agent",
)

if __name__ == "__main__":
    host = os.getenv("AGENT_HOST", "0.0.0.0")
    port = int(os.getenv("AGENT_PORT", "8000"))
    uvicorn.run("sample4:app", host=host, port=port, reload=True)

Source code (Frontend)

'use client';

import { CopilotKit } from '@copilotkit/react-core';
import { CopilotChat } from '@copilotkit/react-ui';

const Home = () => {
  return (
    <CopilotKit runtimeUrl="/master-agent/api/copilotkit" agent="my_agent">
      <CopilotKitPage />
    </CopilotKit>
  );
};

const CopilotKitPage = () => {
  return (
    <div className="flex h-full w-full flex-1 items-center justify-center">
      <div className="h-full w-full rounded-lg">
        <CopilotChat
          className="mx-auto h-full max-w-6xl rounded-2xl"
          labels={{ initial: "Hi, I'm an agent specialized in helping you with your tasks. How can I help you?" }}
        ></CopilotChat>
      </div>
    </div>
  );
};

export default Home;

Version information
Python 3.13.10
agent-framework-ag-ui==1.0.0b260116
agent-framework-core==1.0.0b260116

@copilotkit/react-core: 1.51.2
@copilotkit/react-ui: 1.51.2

Thank you in advance.