Images 2 in Codex fails to generate backgroundless PNG whereas the web version does so perfectly.

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

Version 26.417.41555 (1858)

What subscription do you have?

Pro

What platform is your computer?

MacOS

What issue are you seeing?

Codex experience:

<img width="1148" height="1732" alt="Image" src="https://github.com/user-attachments/assets/0870ead8-1ece-407b-a7df-13e9c874f90a" />

Promopt:

Use case: stylized-concept
Asset type: website category icon
Primary request: create a single grocery category icon for Potatoes, Vegetables and Fruit
Subject: a compact composition of fresh potatoes, carrots, tomatoes, leafy greens, and a pear
Style/medium: polished 3D illustration, soft supermarket-friendly style, clean premium e-commerce iconography
Composition/framing: centered isolated object cluster, square composition, large subject with breathing room around edges
Lighting/mood: soft studio lighting, crisp highlights, subtle natural shadowing on the object only
Color palette: natural produce colors with restrained saturation
Materials/textures: smooth realistic produce surfaces with slight stylization
Constraints: transparent background, no tile, no badge, no text, no border, no watermark, no extra props outside the produce cluster


Web version:

<img width="1924" height="1124" alt="Image" src="https://github.com/user-attachments/assets/9b4067dd-a1d6-473b-8f7e-d7a9a76114e5" />

I'd argue, in a dev flow having the ability to have clean and actually usable assets generated is as important if not more, than web.

What steps can reproduce the bug?

Uploaded thread: 019db53b-09ff-7040-bb33-0cff7d897e74

What is the expected behavior?

A consistent behavior between web and Codex app while following backgroundless PNG images.

Additional information

_No response_