openai / openai/codex

[Windows] Maximized window extends behind translucent taskbar, causing white blurred strip

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app bug windows-os
Dominant language
Rust
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Description

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

OpenAI.Codex 26.915.4065.0 (ChatGPT.exe product version 153.0.8010.48)

What subscription do you have?

Not specified

What platform is your computer?

Microsoft Windows NT 10.0.26200.9457 x64

What issue are you seeing?

When ChatGPT Desktop (Codex app) is maximized, the window extends below the usable Windows work area and renders behind the bottom taskbar. Because the taskbar is translucent, the app's white background shows through as a persistent milky/blurred horizontal strip across the bottom of the screen. The artifact is visible in the attached screenshot.

Screenshot showing the white blurred strip above the translucent Windows taskbar
What steps can reproduce the bug?
  1. Use Windows with the taskbar positioned at the bottom and translucency enabled.
  2. Open ChatGPT Desktop.
  3. Click the maximize button in the window controls.
  4. Observe the bottom edge: the app extends behind the taskbar and produces a white blurred strip through the translucent taskbar.
  5. Restore the window to a non-maximized size; the strip disappears.
What is the expected behavior?

A maximized window should be constrained to the Windows working area and stop at the top edge of the taskbar. No application background should render underneath a visible taskbar, and no white blurred strip should appear.

Additional information

Environment:

  • App package: OpenAI.Codex_26.915.4065.0_x64
  • ChatGPT.exe product version: 153.0.8010.48
  • Single primary display
  • Logical display bounds: 1536 x 960
  • Windows working area: 1536 x 912
  • Bottom taskbar height: 48 logical pixels

Related issues such as #27000 and #45369 describe different maximization/taskbar symptoms; this report specifically concerns a visible translucent taskbar showing the app's white background because the maximized window extends underneath it.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the issue on Windows with a bottom translucent taskbar, using the reported 1536×960 display and 1536×912 work area. Start by locating the desktop window maximization and Windows work-area handling; done means a maximized window stops above the taskbar and the translucent taskbar no longer shows a white strip.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
desktop, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
52/100

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