Each Cyrillic character appears duplicated while typing

What version of Codex CLI is running?

v0.117.0

What subscription do you have?

Each Cyrillic character appears duplicated while typing

Which model were you using?

gpt-5.4

What platform is your computer?

win11 Linux 5.15.146.1-microsoft-standard-WSL2 x86_64 x86_64

What terminal emulator and version are you using (if applicable)?

WSL

What issue are you seeing?

Each Cyrillic character appears duplicated while typing

What steps can reproduce the bug?

1. Open Codex CLI
2. Switch to a Cyrillic keyboard layout (e.g. Russian/Ukrainian)
3. Start typing in the input prompt

What is the expected behavior?

Actual behavior:

• Each Cyrillic character appears duplicated while typing

Expected behavior:

• Characters should appear once, matching actual input

Additional information

What was verified:

• printf 'привет\n' outputs correctly in the same terminal
• cat input does not duplicate characters
• Latin input works normally
• Pasting Cyrillic text into Codex works correctly