Describe the bug

People create new tab to get fresh ideas. But currently, Copilot shares the context and leads errors.

Versions

• Copilot for Xcode: 0.37.127
• Xcode: 16.4 (16F6)
• macOS: 15.6 Beta(24G5054d)

Steps to reproduce

1. Ask copilot to change code for some times, for example, 4 times.
2. Use GitHub to restore to the original state.
3. Open a new tab, ask the first question.

Expected:
Copilot only dealt with the specific question.

What happened:
Copilot revised the code with the four questions. Even if you change the model, for example, from Sonnet 4 to Gemini 2.5 Pro, the result was the same.

Screenshots

Logs

Additional context