[BUG] React #185 infinite re-render loop

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?

I'm using the claude-code portion of the desktop app and the app is constantly crashing on me. I need to hard close and reopen it to fix it.

It is due to an infinite loop error in React.

These are the details that Claude was able to tell me about the error:

1. React error 185 (happening today, Feb 18 — starting at 8:35 PM)

This is appearing in unknown-window.log (the Claude Desktop renderer process). React 185 is: "Maximum update depth exceeded" — a component is causing an infinite re-render loop. It started happening very recently (today) and is occurring repeatedly. This is a bug in Claude Desktop itself, not anything you caused.

1. React error 418 (older, recurring since Jan 28)

This is a hydration mismatch — the server-rendered HTML doesn't match what React expects on the client. Also a Claude Desktop bug, not user-caused.

1. [USER_CONTENT_RENDERER] warnings

c_sharp language highlighting failures and "Token without row" errors — these appear when Claude renders C# code diffs. Cosmetic, not a crash cause.

1. Content Security Policy blocks (recurring)

https://a-api.anthropic.com/v1/m is blocked by CSP — this is an analytics/metrics endpoint that's misconfigured in the app. Not functional.

What Should Happen?

Claude should not be throwing React crash errors.

Error Messages/Logs

[claude.ai-web.log](https://github.com/user-attachments/files/25389212/claude.ai-web.log)
[cowork_vm_node.log](https://github.com/user-attachments/files/25389209/cowork_vm_node.log)
[main.log](https://github.com/user-attachments/files/25389210/main.log)
[unknown-window.log](https://github.com/user-attachments/files/25389211/unknown-window.log)

Steps to Reproduce

...I don't really have a way to reliably reproduce this error in a reduced test case

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.1.3363 (ee4247) 2026-02-17T15:55:21.000Z

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

I'm not using claude-code directly. I'm using claude-code through the desktop app. the error is in the desktop app, not claude-code itself.