Edge DevTools becomes completely unresponsive/frozen when connected to the Vite dev server starting from v8.1.0. Version 8.0.5 and below work perfectly

Describe the bug

Describe the bug

Edge DevTools becomes completely unresponsive/frozen when connected to the Vite dev server starting from v8.1.0. Version 8.0.5 and below work perfectly.

Environment

• Vite: 8.1.0 (broken) / 8.0.5 (working)
• Edge: 版本 153.0.4234.48 (正式版本) (64 位)
• Node: v26.8.1
• OS: windows 10

Reproduction

1. pnpm create vite@latest test-app --template vue-ts
2. pnpm add [email protected] -D
3. pnpm dev
4. Open Edge DevTools (F12) → DevTools main thread freezes

Already ruled out (Clean environment)

• ❌ sourcemap: false → still freezes
• ❌ rolldown: false (fallback to esbuild) → still freezes
• ❌ Removed all unplugin/auto-import plugins → still freezes
• ❌ InPrivate mode (no extensions) → still freezes
• ❌ Clean Vue template (zero business code) → still freezes

Bisect result

• [email protected] ✅ Smooth
• [email protected] ❌ Freezes

Analysis

Since disabling Rolldown doesn't help, this is likely caused by Vite 8.1.0's Dev Server WebSocket/HMR protocol changes conflicting with Edge DevTools' Chromium fork implementation, rather than the bundler itself.

Reproduction

null

Steps to reproduce

No response

System Info

win10

Used Package Manager

pnpm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.