[BUG] Voice mode shows “listening” on Windows but produces no transcript in any local shell - just prints spaces and doesn't transcribe

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?

Claude Code voice mode on Windows enters the “listening” state, but no transcription is produced.

This was working earlier the same day and then stopped suddenly. The only notable change around that time was upgrading PowerShell to 7.6, but the issue also occurs in cmd.exe, so it does not appear to be specific to PowerShell itself.

Environment
OS: Windows 11
Claude Code version: 2.1.81 after reinstall
(previously showed 2.1.83 before reinstall)
Shells tested:
PowerShell 7.6
Command Prompt
Windows Terminal
VS Code integrated terminal
Auth: Claude.ai account login
Microphone permissions: enabled in Windows
Local terminal session: yes
Remote/SSH session: no
Reproduction Steps
Launch Claude Code in a local Windows terminal session
Run /voice
Hold Space to activate push-to-talk
Claude shows “listening”
Speak normally
Release Space
Expected Behaviour

Speech should be transcribed into the prompt input.

Actual Behaviour

Claude shows “listening”, but no transcript appears.
Space is recognised, voice mode appears to activate, but the transcription pipeline seems to produce nothing.

What I Already Tried
Toggled /voice off and on multiple times
Fully closed and reopened Claude Code
Tested in:
Windows Terminal
VS Code integrated terminal
cmd.exe
Confirmed Windows microphone privacy settings are enabled
Confirmed Claude Code had recently accessed the microphone in Windows privacy settings
Tried custom keybindings instead of Space
Reverted keybindings back to default
Reinstalled Claude Code
Same behaviour after reinstall

What Should Happen?

Claude should transcribe my voice input

Error Messages/Logs

None

Steps to Reproduce

/voice - toggle off

/voice - toggle on

press spacebar - start speaking

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude Code v2.1.83

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_