Codex App renders generated image as broken image placeholder

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

Version 26.601.21317 • Released 02.06.2026. CLI visible in the same environment: codex-cli 0.136.0.

What subscription do you have?

ChatGPT Pro, described by the reporter as the highest available private/consumer subscription (possibly referred to as "Pro x20").

What platform is your computer?

Windows Codex App with a WSL workspace.

Observed WSL environment from the reporting workspace:

Linux SimonRy9 6.6.87.2-microsoft-standard-WSL2 x86_64 GNU/Linux

What issue are you seeing?

Generated images sometimes do not render correctly in the Codex App conversation. Instead of showing the generated bitmap inline, the chat displays a broken image icon and the localized alt text Generiertes Bild 1.

In the attached/reported screenshot, the assistant message says it created a new concept screen, but the image area below only shows the small broken-image indicator plus Generiertes Bild 1. The rest of the chat remains usable, so this appears to be an image rendering/asset resolution issue rather than a full session crash.

This looks related to, but slightly different from, openai/codex#19027. In openai/codex#19027 the generated images were not automatically embedded. Here the UI appears to attempt rendering an image entry, but the rendered result is broken and only the fallback alt text is visible.

What steps can reproduce the bug?

1. Use the Codex App on Windows with a WSL-backed workspace.
2. Ask Codex to generate a visual concept/mockup/image.
3. Wait for the image generation response to complete.
4. Observe the generated image area in the conversation.
5. Sometimes the image is not displayed; only a broken image icon and text such as Generiertes Bild 1 are shown.

What is the expected behavior?

Generated images should render inline in the Codex App chat once generation completes. If the image file cannot be resolved or loaded, the UI should expose a clear error or file/path diagnostic instead of silently falling back to a broken image placeholder.

Additional information

Screenshot context from the report:

• Codex App UI language: German.
• The visible failed image label is Generiertes Bild 1.
• The workspace shown in the app is sanctum-os.
• The active thread was generating a website concept/mockup.
• The right environment panel shows a local workspace and branch main.

I do not have the exact generated image file path from the screenshot, so this report is based on the visible app behavior rather than a specific local file inspection.