[BUG] input lag while typing in v2.0.72

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?

Description

Severe input lag when typing in the Claude Code terminal. Each keystroke has noticeable delay.

Environment

• Claude Code version: 2.0.72
• OS: Ubuntu (Linux 6.14.0)
• Node.js: v20 (also reproduced on v18.19.1)
• Terminal: Direct terminal and VS Code terminal

Workaround

Downgrading to v2.0.71 resolves the issue:
npm install -g @anthropic-ai/claude-code@2.0.71

What Should Happen?

Typing should be instant with no perceptible lag.

Error Messages/Logs

Steps to Reproduce

1. Install claude-code@2.0.72
2. Start a conversation
3. Type in the input field
4. Notice significant lag/delay on each keystroke

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

v2.0.71

Claude Code Version

v2.0.72

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

• Issue is new to 2.0.72, same environment worked fine for months
• Not related to conversation length (occurred in relatively short conversations)
• Not related to system resources (plenty of RAM/CPU available)
• Sometimes the lag would be gone for new conversations, but always came back after a few prompts