Codex Windows App – UI closes but background processes remain, blocking relaunch

I’ve run into a consistent issue with the Codex desktop app on Windows that looks like a process lifecycle bug.

Behavior:

• I close the Codex UI window normally.
• The application appears to exit.
• However, one or more background processes remain running.
• Attempting to reopen Codex does nothing — presumably because it detects an already running instance.
• The only way to recover is to manually kill the leftover processes in Task Manager.

Notes:

• This happens consistently, not sporadically.
• Feels like either:
  • The app is not properly shutting down its process tree, or
  • The single-instance guard is too strict and doesn’t recover from orphaned processes.
• If this is intentional (e.g., tray/minimized behavior), it’s not clear to the user and there’s no visible way to properly “quit” the app.

This isn’t a blocker, but it’s disruptive enough to break normal workflow.