[BUG] Conversation history not persisting - only shows current warmup message instead of original content

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Bug Description

When reopening a previous conversation from the history, the conversation window shows only the assistant's current "Warmup" message instead of displaying the original conversation content.

Steps to Reproduce

1. Have a conversation with Claude Code in VS Code
2. Close VS Code or start a new conversation
3. Reopen VS Code
4. Click on a previous conversation from the history sidebar
5. Observe that the conversation shows only the current session's warmup message

Expected Behavior

When clicking on a previous conversation in the history, I should see all the original messages exchanged in that conversation (both user messages and assistant responses).

Actual Behavior

The conversation title is preserved (e.g., "Όδόντι Τι θέλω"), but the content shows only the assistant's current "Warmup" message instead of the original conversation content. The historical conversation data appears to be lost.

Troubleshooting Steps Already Attempted

• ✅ Reset the extension
• ✅ Uninstall and reinstall Claude Code extension
• ❌ Issue persists after all attempts

Comparison with Other AI Extensions

Other AI coding assistants (Gemini, Codex GPT, GitHub Copilot) properly persist conversation history without issues in the same VS Code environment, suggesting this is specific to Claude Code.

Screenshot

[Attach the screenshot you showed me]

Environment

• VS Code Version: [1.105.1]
• Claude Code Extension Version: [2.0.22]
• OS: Windows (Edition Windows 10 Pro Version 22H2 Installed on ‎2/‎8/‎2024 OS Build 19045.6456)

Impact

This makes it impossible to reference or continue previous conversations, losing important context and work history.

What Should Happen?

Like every other extension i am using like Gemini, Codex-GPT ... , to be able to see and work on my previous chats.

Error Messages/Logs

Steps to Reproduce

<img width="585" height="366" alt="Image" src="https://github.com/user-attachments/assets/0a093526-ebce-47b4-8495-4e6dceb14730" />

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.0.22

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_