[macOS][Codex Desktop] Completed sub-agents remain under Running until opened

What version of the Codex App are you using?

ChatGPT/Codex Desktop 26.810.41047 (build 6570)
Codex app-server 0.148.0-alpha.9

Platform

macOS 26.6.1 (25G76), arm64

What issue are you seeing?

Completed sub-agents remain listed under Running.

Opening one of those sub-agents shows that it has already stopped/completed. After returning to the sub-agent list, that same agent finally moves into Done.

This makes the running-agent count unreliable and makes it difficult to tell whether work is genuinely still active.

Steps to reproduce

1. Start several sub-agents in one chat.
2. Allow one or more sub-agents to complete.
3. Open the sub-agent list.
4. Observe that completed agents are still under Running.
5. Open one of those agents. Its detail view shows it has stopped/completed.
6. Return to the list. It now moves to Done.

Expected behavior

The list should move a sub-agent to Done as soon as its turn completes, without requiring the user to open that agent.

Diagnostic clue

The local desktop log records:

• collab_hydration initially failing because a newly created rollout is temporarily empty.
• Later turn/started and turn/completed events being received for an unknown conversation.

This suggests a possible hydration/state-registration race: after the initial empty-rollout failure, the conversation may not be registered, so later lifecycle events are discarded. Opening the child appears to force a fresh read and reconcile the displayed state.

Potential handling options could be retrying hydration after an empty rollout or buffering lifecycle events until the conversation is registered.

A short screen recording showing the deterministic UI sequence will be added in a follow-up comment.

Related reports

• https://github.com/openai/codex/issues/18252
• https://github.com/openai/codex/issues/23292

Start by reproducing the macOS sequence and examining desktop logs for collab_hydration, turn/started, and turn/completed events, especially the unknown-conversation messages. Trace how sub-agent lifecycle events update the Running and Done lists; done means completed agents move to Done without being opened.