**Describe the bug** Running "https://github.com/cloudwego/eino-examples/blob/main/quickstart/chatwitheino/cmd/ch08/main.go" , sometimes causes panic **Screenshots** <img width="1706" height="772" alt="Image" src="https://github.com/user-attachments/assets/a42d2d37-8e16-4f01-970a-e1733c8aa89b" />
Describe the bug
Running "https://github.com/cloudwego/eino-examples/blob/main/quickstart/chatwitheino/cmd/ch08/main.go" , sometimes causes panic
Screenshots