[BUG] Input text reappears in input box after submitting prompt

Bug Description

After typing a prompt and pressing Enter to submit it, the submitted text reappears in the input box at the bottom of the terminal while Claude is actively processing the request. The input field should be cleared after submission, but instead it retains/re-populates with the just-submitted prompt text.

Steps to Reproduce

1. Launch Claude Code
2. Type a prompt in the input box
3. Press Enter to submit
4. Observe that the same prompt text reappears in the input box while Claude is processing

Expected Behavior

The input box should be cleared after the prompt is submitted.

Actual Behavior

The submitted prompt text reappears in the input field while Claude processes the request.

Environment

• Claude Code version: 2.1.50
• OS: Windows 11 Home 10.0.26100
• Terminal: Windows Terminal
• Shell: bash