I think there may be a bug when creating or updating a plan mid-session.

I think there may be a bug when creating or updating a plan mid-session.

Sometimes, instead of updating the plan TODOs and asking me how I want to proceed, Copilot appears to repeat or surface an answer from an earlier prompt in the same session. This can be completely unrelated to the current plan request.

Expected behavior: when I ask Copilot to make or update a plan, it should update the TODOs / plan state and then ask me how to proceed.

Actual behavior: it sometimes returns an old response from a previous prompt, as if the session context or response state got mixed up.

---
| Field | Value |
| --- | --- |
| App version | 1.0.18 |
| OS | macOS 26.5.2 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 7 |

首先在应用版本 1.0.18 的 /chat 流程中复现该问题，重点关注在同一会话中先前的 prompts 之后创建或更新 plan。跟踪 session response 和 plan-state 的处理，以确定为什么会显示较早的回答；当 plan TODOs 已更新，并且 Copilot 转而询问应如何继续时，即表示完成。

由索引模型根据 Issue 内容生成。