Opening large Codex App sessions shows a long blank screen before content loads

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

26.623.42026

What subscription do you have?

Pro

What platform is your computer?

Windows11 x64

What issue are you seeing?

When opening a session with a large amount of conversation history, Codex App shows a blank white screen for a long time before the session content appears.

What steps can reproduce the bug?

1. Open Codex App.
2. Select a session with a large amount of content/history.
3. Wait for the session to load.

What is the expected behavior?

The app should show existing content progressively, or at least display a loading state/skeleton UI while the session is loading.

Additional information

_No response_