claude-code - 💡(How to fix) Fix Desktop app freezes when opening right sidebar panel [1 participants]

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anthropics/claude-code#46839Fetched 2026-04-12 13:31:42
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Every time I open the right sidebar panel (file explorer / search panel), the entire application freezes for several seconds. The sidebar shows a loading spinner while the main conversation area becomes unresponsive.

Root Cause

Every time I open the right sidebar panel (file explorer / search panel), the entire application freezes for several seconds. The sidebar shows a loading spinner while the main conversation area becomes unresponsive.

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Description

Every time I open the right sidebar panel (file explorer / search panel), the entire application freezes for several seconds. The sidebar shows a loading spinner while the main conversation area becomes unresponsive.

Steps to reproduce

  1. Open Claude Code desktop app (Windows)
  2. Have multiple worktrees in the left sidebar
  3. Click the sidebar toggle button (top-right) to open the right panel
  4. Observe: the entire app freezes/stutters until the panel finishes loading

Expected behavior

The sidebar should open without blocking the main UI thread.

Actual behavior

The app becomes unresponsive for several seconds. The right panel shows a loading spinner, and the conversation area cannot be scrolled or interacted with during this time.

Environment

  • Platform: Windows 11 Pro (10.0.26200)
  • App: Claude Code Desktop (Orca)
  • Worktrees: 3 repos with multiple worktrees active
  • Repo contents: HTML files (1000+ lines each), markdown files

Screenshot

The red-bordered area is the right sidebar panel that triggers the freeze:

sidebar-freeze

(Right panel open with loading spinner, app unresponsive)

extent analysis

TL;DR

The application freeze when opening the right sidebar panel may be caused by a blocking operation on the main UI thread, and a potential fix could involve optimizing or asynchronous loading of the panel's content.

Guidance

  • Investigate the code responsible for loading the right sidebar panel's content to identify any blocking or synchronous operations that could be causing the freeze.
  • Consider implementing asynchronous loading or lazy loading for the panel's content to prevent blocking the main UI thread.
  • Review the application's threading model to ensure that UI-related operations are properly isolated from computationally expensive tasks.
  • Profile the application's performance to identify potential bottlenecks or areas for optimization.

Example

No specific code snippet can be provided without more information about the application's codebase, but an example of asynchronous loading might involve using a callback or promise to load the panel's content after the UI has finished rendering.

Notes

The root cause of the issue may be related to the specific contents of the repositories or the number of worktrees, so further investigation may be needed to determine the exact cause.

Recommendation

Apply a workaround by optimizing the loading of the right sidebar panel's content, such as by using asynchronous loading or lazy loading, to prevent blocking the main UI thread. This approach is recommended because it addresses the likely cause of the issue and can be implemented without requiring significant changes to the application's architecture.

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FAQ

Expected behavior

The sidebar should open without blocking the main UI thread.

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