[BUG] Claude Code on the web silently stops mid-task after tool calls

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?

On Claude Code on the web, the agent frequently halts mid-task after a tool call (typically a file read) without producing any further output, error, or summary.

What Should Happen?

After a successful tool call, the agent should continue executing the task autonomously

Error Messages/Logs

Steps to Reproduce

Non-deterministic, but happens often:

1. Start a multi-step task on claude.ai/code
2. After an early tool call, the agent sometimes stops silently
3. Sending Continue resumes it without issue

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

claude code on the web

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_