Swedish characters (åäö) duplicate when typed in CLI input

What version of Codex CLI is running?

codex-cli 0.118.0

What subscription do you have?

Pro

Which model were you using?

gpt-5.4

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

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

Windows terminal with WSL

What issue are you seeing?

When typing Swedish characters (å, ä, ö) in the Codex CLI, each character is inserted twice instead of once.

What steps can reproduce the bug?

Steps to reproduce:

1. Open Codex CLI
2. Type any Swedish text containing å, ä, or ö, example "Hur går det?"
3. Observe the input field

What is the expected behavior?

Expected behavior:
Hur går det?

Actual behavior:
Hur gåår det?

Additional information

_No response_