[BUG] Fullscreen Renderer. - mouse scrolling collapses input window

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?

With the Fullscreen renderer flag turned on and mouse speed set to 3, when I scroll up in a conversation window, and then back down,

!Image
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the input box pinned to the bottom of the screen collapses so I can't see or select. the input box.

What Should Happen?

Modify the input box height to be fixed so it cannot become unaccessible. I tried resizing the iTerm2 window and it did not affect the output.

Error Messages/Logs

Steps to Reproduce

1. Open a terminal session with Fullscreen Renderer turned on
2. scroll up in the conversation window (mouse scroll)
3. scroll down in the conversation window (mouse scroll)
4. input box collapses

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.92

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

_No response_