Codex App: plan is rendered as plain assistant output when a side task is active

What version of the Codex App are you using (From “About Codex” dialog)?

26.803.5235.0

What subscription do you have?

Unknown (not visible in the current task context)

What platform is your computer?

Microsoft Windows NT 10.0.22631.0 x64

What issue are you seeing?

When a side task / child task is active and shown alongside the main task, the plan in the main conversation is rendered differently from a plan in a task without side tasks.

Instead of using the normal structured plan UI and styling, Codex directly outputs the plan as ordinary assistant message content. This makes plan presentation inconsistent depending on whether the task has a side task.

What steps can reproduce the bug?

1. Open a task in the Codex App and ask Codex to create or update a multi-step plan.
2. Observe that the plan is displayed with the normal structured plan UI.
3. Start a side task / child task so that it appears alongside the main task.
4. In the main task, ask Codex to create, list, or update the plan again.
5. Observe that the plan is directly emitted as plain assistant output instead of being rendered with the normal plan styling.

What is the expected behavior?

Plans should use the same structured plan component and styling in both cases, regardless of whether a side task / child task is active.

Additional information

This appears to be a presentation/rendering inconsistency in the Codex App rather than a difference in the plan content itself.

Reproduce the issue in the Codex App on Windows with a main task and an active side task. Trace the plan rendering path for the main conversation and compare it with the normal structured plan display. Done means plans use the same structured component and styling whether or not a child task is active.