Windows desktop terminal pastes clipboard contents twice with Ctrl+Shift+V and Shift+Insert

Version

Codex desktop for Windows
OpenAI.Codex_26.325.3894.0_x64__2p2nqsd0c76g0

Platform

Windows

What steps can reproduce the bug?

1. Open the Codex desktop app.
2. Open the integrated terminal.
3. Copy a short piece of text, for example hello.
4. In the Codex terminal, press Ctrl+Shift+V.

Expected

Paste once.

Actual

The text is pasted twice.

Additional reproduction note

Shift+Insert shows the same behavior.
Switching the integrated shell from Command Prompt to PowerShell did not fix it.

Additional information

• This appears to be specific to the Codex desktop terminal.
• I did not find a user keybinding override or system-wide remapper causing it.
• Right-click paste / Edit > Paste may be worth checking as a workaround path.
• Related Windows/input handling issues in Codex:
• https://github.com/openai/codex/issues/2597
• https://github.com/openai/codex/issues/3397