[BUG] iOS Claude Code composer lag

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 Code tab on the Claude iOS app, if you paste in a long file (~2000+ lines), and attempt to type at the top of the composer, the composer becomes unbearably slow.

What Should Happen?

Composer should remain fast and easy to use

Error Messages/Logs

Steps to Reproduce

• Find a ~2000+ line file and copy it into clipboard
• Open the Claude app, click Code, click composer bar, paste
• Observe lag

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Mobile

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_