Plan mode appears to bind to the next runnable task instead of the queued prompt it was selected for

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

26.409.20454 (1462)

What subscription do you have?

Pro

What platform is your computer?

Darwin 24.6.0 arm64 arm

What issue are you seeing?

I’m seeing behavior in Codex where plan mode does not appear to stay attached to the specific queued prompt I selected it for.

What steps can reproduce the bug?

Prompt A → executing
Prompt B → queued
Enable Plan mode
Queue Prompt C
Prompt A finishes
Prompt B starts → runs in Plan mode (unexpected)
Disable Plan mode
Prompt B finishes
Prompt C starts → runs as a normal prompt (not Plan)

What is the expected behavior?

When I queue Prompt C with plan mode enabled, plan mode should apply only to Prompt C, regardless of when it executes

Additional information

_No response_