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claude-code - 💡(How to fix) Fix [BUG] Claude Desktop app stuck on "Shimmying..." indefinitely - not executing any actions [1 participants]

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anthropics/claude-code#46214•Fetched 2026-04-11 06:26:09
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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

When sending a message in the Claude Desktop app (Windows 10), the app gets stuck on "Shimmying..." indefinitely. It never starts executing any tools or producing output. This has been happening consistently for the past 2 weeks.

The issue occurs regardless of the prompt content — simple or complex messages all get stuck at the same "Shimmying..." loading state. Stopping and resending sometimes works, but the problem keeps recurring.

Platform: Windows 10 Home (10.0.19045) App: Claude Desktop (latest version) Model: Opus 4.6 (1M context)

What Should Happen?

The app should proceed past the "Shimmying..." state and begin executing the request normally — calling tools, generating output, or responding to the user. It should not hang indefinitely on the loading animation.

Error Messages/Logs

Steps to Reproduce

  1. Open Claude Desktop app on Windows 10
  2. Send any message (simple or complex)
  3. The app shows "Shimmying..." loading animation
  4. It stays stuck on "Shimmying..." indefinitely — no tools are called, no output is generated
  5. Clicking Stop and resending sometimes works, but the issue recurs frequently

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

No response

Claude Code Version

Claude Desktop app (latest version, Windows)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

extent analysis

TL;DR

The issue might be resolved by investigating and addressing potential issues with the Anthropic API or the Opus 4.6 model integration, as the problem is consistent across different prompts and occurs in the latest version of the Claude Desktop app.

Guidance

  • Review the Anthropic API documentation and integration with the Claude Desktop app to ensure correct usage and configuration.
  • Investigate potential issues with the Opus 4.6 model, such as compatibility problems or incorrect initialization.
  • Test the app with a different model or API endpoint, if possible, to isolate the issue.
  • Consider reaching out to the Anthropic API support team or the Claude Desktop app developers for further assistance, as the issue may be related to a regression in a previous version.

Notes

The issue report lacks specific error messages or logs, which could provide more insight into the problem. Additionally, the report mentions the operating system as macOS, but the issue occurs on Windows 10, which may indicate a discrepancy in the report.

Recommendation

Apply workaround: Since the issue is consistent and occurs in the latest version, it may be necessary to apply a temporary workaround, such as using a different model or API endpoint, until the root cause can be identified and addressed.

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#api#agent setup#task chaining#parallel task#integration issue

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