[BUG] Plan gets lost if user doesn't respond within a certain amount of time, has to be recreated

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.96
• Operating System: macOS 15.6.1 (24G90)
• Terminal: VS Code (zsh)

Bug Description

I'm not sure how long has to elapse (maybe token cache expiry?, but it has happened to me several times that I asked for the plan, had to do something else, came back, was happy with it and accepted, just for it to disappear and Claude had to redo the plan.

Steps to Reproduce

1. Have Claude create a plan in plan mode
2. Step away from your computer
3. Approve the plan, just to see it disappear and watch Claude recreate it from scratch

Expected Behavior

Plan is persisted by the CLI and gets sent back to Claude for execution

Actual Behavior

Plan disappears

Additional Context

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