Codex CLI terminal title animation issues under `screen`

Resolved 💬 3 comments Opened Apr 9, 2026 by ktorn Closed Apr 9, 2026

What version of Codex CLI is running?

codex-cli 0.118.0

What subscription do you have?

Plus

Which model were you using?

gpt-5.4

What platform is your computer?

Linux 6.8.0-107-generic x86_64 x86_64

What terminal emulator and version are you using (if applicable)?

iTerm2 accessing screen via SSH + screen and tmux

What issue are you seeing?

I am running several codex instances on a remote Linux VM, which I access via ssh, on iTerm2 from a MacOS machine.

I also use screen and sometimes tmux to keep these instances running while I'm offline.

Recently codex introduced a working / loading spinner animation on the terminal window while it generates an output.
This animation does not appear on tmux, but does appear on a plain ssh terminal, and when using screen.

On a plain ssh terminal (with iTerm2) the animation works fine:

!Image

However, under screen, it glitches, causing terminal bell sounds continuously:

!Image

What steps can reproduce the bug?

SSH to a Linux host, start a screen session, start codex, and issue a prompt.

What is the expected behavior?

I expect not to see any progress on the terminal window, similarly to tmux

Additional information

_No response_

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