/voice command fails with 'check internet' error despite stable connection

Description

The /voice command fails immediately with a message asking to check internet connection, even though the internet connection is fully stable and responsive.

Steps to Reproduce

1. Open Claude Code CLI
2. Run /voice
3. Output: Voice mode enabled. Hold Space to record.
4. Hold Space to record → fails with "check internet" error

Expected Behavior

Voice mode should successfully record and transcribe speech.

Actual Behavior

Voice mode reports an internet connectivity issue despite the connection being fully functional.

Environment

• Claude Code version: 2.1.74
• OS: Windows 11 Pro Insider Preview (Build 29531)
• Platform: MINGW64_NT-10.0-29531 (Git Bash)
• Architecture: x64
• Processor: AMD Ryzen 5 3600 6-Core @ 3600 MHz
• RAM: 32 GB
• Node.js: v24.13.1
• npm: 11.8.0

Network Diagnostics

Connection to Anthropic API is stable:

curl https://api.anthropic.com
  HTTP Code: 404 (expected — server responds)
  Total time: 0.174s
  DNS lookup: 0.046s

ping api.anthropic.com (160.79.104.10)
  Sent: 3, Received: 3, Lost: 0 (0% loss)
  Min: 38ms, Max: 41ms, Avg: 39ms

The CLI itself works perfectly — this issue is isolated to the /voice feature.

Additional Context

• The Claude Code session is fully functional for all other operations (chat, tool use, etc.)
• No VPN or proxy is active
• Firewall is not blocking Anthropic endpoints (confirmed by successful curl/ping)