[BUG] Claude mobile app, Code tab: hardware (Bluetooth) keyboard input moves focus to the back arrow after ~3 characters

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?

In the Claude mobile app, Code tab, when I type into the prompt composer with a Bluetooth keyboard, the focus consistently jumps from the text field to the back-arrow button in the top-left corner after roughly 3 characters. Any further keystrokes go to the back arrow instead of the input field. The Chat tab does not have this problem: the same keyboard types normally there.

What Should Happen?

The prompt composer in the Code tab should keep keyboard focus while typing, the same way the Chat tab does.

Error Messages/Logs

Steps to Reproduce

1. Pair a Bluetooth keyboard (NuPhy Air75, 84 keys, wireless) with the phone.
2. Open the Claude app and switch to the Code tab.
3. Open a session (new or existing) and tap the prompt input field.
4. Type a few characters on the Bluetooth keyboard.
5. After about 3 characters, focus moves to the back arrow at the top-left; typing no longer reaches the input field.
6. Repeat in the Chat tab: typing works normally.

Reproduces consistently, not intermittently.

Claude Model

Not sure / Multiple models

Is this a regression?

Yes. Started to happen since 5days ago

Last Working Version

No response

Claude Code Version

Claude mobile app, updated on 2026-09-14

Platform

Other

Operating System

Windows

Terminal/Shell

Other

Additional Information

• Device: Galaxy Z Fold8 Ultra
• Keyboard: NuPhy Air75 84-key wireless, connected via Bluetooth
• The issue is specific to the Code tab; Chat tab is unaffected with the same keyboard.