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Codex Issues / #36568

Windows app: Korean IME Hangul/English toggle intermittently stops working in chat composer

Open 💬 2 comments Opened Aug 2, 2026 by pender64
💡 Likely answer: A maintainer (github-actions[bot], contributor) responded on this thread — see the highlighted reply below.

Codex App version

26.727.6591.0

Platform

Windows x64, Korean IME

Issue

The Korean IME Hangul/English input-mode toggle intermittently stops working while the Codex chat composer has focus.

Switching focus away from the Codex window and then returning to it restores the Hangul/English toggle. This suggests that the composer or window occasionally enters an incorrect IME/focus state.

Steps to reproduce

  1. Open a chat in the Codex Windows app.
  2. Focus the chat composer and type using the Korean IME.
  3. Continue normal chat use and attempt to switch between Hangul and English input modes using the Korean/English toggle key.
  4. Observe that the toggle intermittently stops changing the input mode.
  5. Move focus to another window, then return to the Codex window and focus the composer again.

Observed behavior

The Hangul/English toggle sometimes does not work in the chat composer. Changing the active window and returning restores normal input-mode switching.

Expected behavior

The Korean IME Hangul/English toggle should work reliably whenever the chat composer is focused, without requiring the user to change window focus.

Additional notes

  • The problem is intermittent.
  • Recovery is consistently associated with moving window focus away and back.
  • This may be related to composer focus or IME activation handling.
  • This report intentionally excludes chat content, local paths, and private workspace data.

View original on GitHub ↗

2 Comments

github-actions[bot] contributor · 26 days ago

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

  • #35469

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sunpunggi1 · 14 days ago

I can reproduce a closely related focus/IME variant consistently on the current Windows app.

  • Codex App: 26.803.10989.0
  • Platform: Microsoft Windows NT 10.0.26200.0 x64
  • Input method: Microsoft Korean IME
  • In the Codex composer, switch to Hangul mode.
  • Alt+Tab to another application, then return to Codex.
  • Codex has switched back to English input mode every time.
  • The reverse also reproduces: leave another application in Hangul mode, switch to Codex, and Codex initially uses English.
  • Notepad and browser windows preserve Hangul mode across the same Alt+Tab test.
  • The issue persists after reboot.
  • Windows per-app input-method memory was disabled and the issue still reproduced.
  • No AutoHotkey process, startup script, or keyboard remapping is active.

Expected: The Codex composer should preserve the active Hangul/English IME mode when the window loses and regains focus.