### Preflight Checklist - [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) 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? What's wrong? The GPU process crashes every time a session's browser preview opens, killing the app. On session resume the preview reopens automatically,

[BUG] GPU process crash immediately after browser preview opens — Windows 11, RX 9070 XT

Status Open

Reported on v2.1.247

Maintainer reply None cached

Workaround ✓ Mentioned in description ↑

Activity 0 comments · opened Aug 30, 2026

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?

What's wrong?

The GPU process crashes every time a session's browser preview opens, killing the app. On session resume the preview reopens automatically, so the crash re-arms itself: the app dies within seconds of relaunch, every time. Recovering requires Settings → Apps → Claude → Repair.

Sequence from main.log, identical on every occurrence:

What Should Happen?

[Preview] Created session preview context { previewId: 'preview-local_...' }
[Preview] Created browser preview { serverId: 'browser-preview-...' }
[PreviewContext] Blocked subresource to private-resolving host { resourceType: 'xhr' }
GPU process gone: { type: 'GPU', reason: 'crashed', exitCode: 101457950, serviceName: 'GPU' }

The preview target is a Cloudflare Pages site whose front end calls a local dev server on 127.0.0.1:8765. Note the Blocked subresource to private-resolving host warning immediately before the crash — a blocked private-host XHR inside the preview appears to precede the GPU teardown every time.

Before the preview opens the app is stable: it ran 11 minutes (09:47 → 09:58) with 13 MCP servers connected and no issues. The crash only ever occurs at preview creation.

Error Messages/Logs

Steps to Reproduce

Steps to reproduce

Open a Claude Code session on a local project
Let the session open a browser preview of a site that makes requests to a private/loopback host
GPU process crashes, app dies

Expected: a failing preview should degrade gracefully, not take down the GPU process and the app.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Environment Claude Desktop 1.40609.0.0 (MSIX Store install, Claude_1.40609.0.0_x64__pzs8sxrjxfjjc) Claude Code binary 2.1.247 Windows 11 AMD Radeon RX 9070 XT + Radeon Graphics (hybrid), Ryzen 7 9700X Adrenalin 26.8.1 (clean install with factory reset), chipset 8.08.12.551

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Environment

Claude Desktop 1.40609.0.0 (MSIX Store install, Claude_1.40609.0.0_x64__pzs8sxrjxfjjc)
Claude Code binary 2.1.247
Windows 11
AMD Radeon RX 9070 XT + Radeon Graphics (hybrid), Ryzen 7 9700X
Adrenalin 26.8.1 (clean install with factory reset), chipset 8.08.12.551

Already tried, no effect

Full purge + clean reinstall of the app
Latest AMD driver, clean install, reboot
GPU preference forced to both Power saving and High performance
Windowed game optimizations disabled
Windows Repair (fails: "We couldn't repair this app")
No hardware acceleration toggle exists in app Settings for this build

Workaround: native Claude Code CLI in PowerShell works fine.

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