Codex VS Code extension drops sometimes follow-up prompt submitted while agent is still running

Codex VS Code extension drops follow-up prompt submitted while agent is still running

When using the Codex VS Code extension, I sometimes type a follow-up prompt into the same active agent/thread while Codex is still working. When I press Enter, the input appears to be submitted, but it disappears and is not processed after the current agent step finishes.

Expected behavior:
The follow-up prompt should either be queued visibly, sent after the current turn completes, or remain in the composer if it cannot be submitted yet.

Actual behavior:
The typed follow-up prompt is lost after pressing Enter.

Reproduction:

Open VS Code with the Codex extension.
Start an agent task that takes long enough to remain visibly active.
While the agent is still working, type a follow-up prompt in the same Codex thread.
Press Enter.
Observe that the prompt disappears and is not processed.

Remark: It happens not every time, may be from 10 times it happens once.

Environment:

OS: Observed at Windows 11 as well as under Linux Ubuntu Desktop and Linux Mint
VS Code version: 1.127.0
Codex Plugin Version : 26.623.101652
Electron: 42.2.0
ElectronBuildId: 14159160
Chromium: 148.0.7778.97
Node.js: 24.15.0
V8: 14.8.178.14-electron.0
OS: Linux x64 6.8.0-124-generic