Messages sent while final output text is streamed are injected in UI then ignored, rather than properly queued #4446
Description
What version of Codex is running?
0.42.0
Which model were you using?
gpt-5
What platform is your computer?
Darwin 24.5.0 arm64 arm
What steps can reproduce the bug?
- Query model
- Wait until final text response is being streamed (rather than mid file reading, reasoning, etc)
- Attempt to send message
What is the expected behavior?
Messages should be queued when sent at any state of streaming non-completion
What do you see instead?
Message is injected into the middle of the streamed text in the UI, and seemingly ignored once streaming completes.
Additional information
No response