[BUG] Unable to specify AWS eu-central-1 as a region when using a Bedrock API key

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?

I'm trying to use /login to update an expired AWS Bedrock API key.

When attempting to specify the region as eu-central-1, typing eu-cen cancels the command input.

Typing another region, such as eu-west-1 works without issues.
Pasting eu-central-1 as a string works without issues.

https://github.com/user-attachments/assets/dca5c383-07bf-4e19-b24f-5b1c04e94996

What Should Happen?

The TUI should allow me to type eu-central-1 into the input field without cancelling the command.

Error Messages/Logs

Steps to Reproduce

1. Open Claude in a terminal. (in my case, I'm SSHing into an EC2 instance running Amazon Linux 2023)
2. Run /login.
3. Choose _3. 3rd-party platform_.
4. Choose _1. Amazon Bedrock_.
5. Choose _2. Bedrock API key (bearer token)_.
6. Paste the Bedrock API key, as seen in the attached recording.
7. The screen will show a _Where your Bedrock models are enabled._ prompt, as seen in the attached recording.
8. Type _eu-central-1_, as seen in the attached recording.

The TUI cancels the request as soon as I type the n key, as seen in the attached recording.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.114

Platform

AWS Bedrock

Operating System

Other Linux

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_