[BUG] Pressing ESC key causes input to become unresponsive on Termux

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report
• [x] I am using the latest version of Claude Code

What's Wrong?

On Termux (Android terminal emulator), pressing the ESC key causes the input bar to become completely unresponsive. After pressing ESC:

• Cannot type any characters into the input
• The session must be closed and restarted to continue

This is a Termux-specific issue - the same behavior does not occur on other terminals.

What Should Happen?

Pressing ESC should either:

• Have no effect when at the main input prompt, or
• Cancel any current operation and return focus to the input prompt

The input should remain functional after pressing ESC.

Steps to Reproduce

1. Install Claude Code on Termux (Android)
2. Run claude
3. Press the ESC key
4. Try to type anything
5. Observe: no characters appear, input is unresponsive
6. Only way to recover is to close and restart Claude

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Claude Code Version

2.1.22 (also reported on 2.1.23)

Platform

Anthropic API

Operating System

Other Linux (Android/Termux)

Terminal/Shell

Other (Termux - Android terminal emulator)

Additional Information

This may be related to how Ink (the terminal UI library) handles raw mode input on Termux. The ESC key may be triggering a state change that isn't properly recovered from.

Related Termux issues filed:

• #21675 - Input box collapses to zero height (rendering issue)
• #21677 - Terminal title updates cause notification overlay

Termux environment:

• TERM=xterm-256color
• COLORTERM=truecolor

The ESC key handling may be putting stdin into a state that Termux doesn't recover from properly, or focus may be getting transferred to a non-existent UI element.