Unable to update the messages under useChat @ version.3.1.1

[liuhuapiaoyuan]

Description

Unable to update the messages under useChat

"dependencies": {
    "@langchain/openai": "^0.0.28",
    "ai": "^3.1.1",
    "langchain": "^0.1.36",
    "next": "14.2.3",
    "openai": "^4.40.1",
    "react": "^18",
    "react-dom": "^18"
  },

Code example

Additional context

[liuhuapiaoyuan]

The obvious endpoint has successfully returned the relevant information, but why is it not displaying on the UI?

[liuhuapiaoyuan]

It turns out you need to configure streamMode:"text"... Why isn't it mentioned in the documentation, and I remember that in version 2.x it was the default.