Codex Desktop (Windows) Maximization bug

Open 💬 7 comments Opened May 29, 2026 by Corriscant

💡 Likely answer: A maintainer (github-actions[bot], contributor) responded on this thread — see the highlighted reply below.

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

26.527.30818

What subscription do you have?

Pro

What platform is your computer?

Windows 10

What issue are you seeing?

Click on Maximize window five weird UI look. Like title is transparent and you may see overlapping with App below Codex.

What steps can reproduce the bug?

Just open Codex and click Maximize window.

What is the expected behavior?

Window should become maximized as usual.

Additional information

_No response_

View original on GitHub ↗

7 Comments

github-actions[bot] contributor · 1 month ago

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

#25154

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biohazardous-man · 1 month ago

Replicates for me on same version on Windows 10

chrichuang218 · 1 month ago

its same codex version 26.527.3686.0

Hendra827 · 1 month ago

same problem codex version 26.527.3686.0

P3SSOA · 1 month ago

same

yaxigeigei · 1 month ago

Additional repro detail for what looks like the same maximization bug:

Platform: Windows, dual-monitor setup
Affected monitor: secondary side vertical monitor
Display scaling: both monitors at 100%
Behavior: when Codex is maximized on the vertical monitor, its left edge/painted area bleeds into the adjacent monitor
Control check: Notepad maximized on the same vertical monitor does not bleed into the adjacent monitor
Workaround check: restored/non-maximized Codex manually positioned to fill the monitor also does not bleed
Interpretation: this appears specific to Codex's maximized/custom-frame behavior rather than Windows monitor layout or scaling

Codex app version: not checked from the About dialog yet.

paomiantouu · 1 month ago

I can reproduce a related transparency issue on Windows.

Environment:

App: OpenAI Codex Desktop
Version: 26.601.2237.0
OS: Windows x64

Behavior:
When the "Translucent sidebar" option is enabled in Codex settings, maximizing the Codex window causes abnormal transparency in the top menu bar and the left conversation/sidebar area.

Important detail:
This only happens when the window is maximized. It does not happen in F11 fullscreen mode.

Workaround:
Disabling the "Translucent sidebar" option immediately fixes the issue.

Expected behavior:
The translucent sidebar setting should not cause the menu bar or sidebar background to become incorrectly transparent when the window is maximized.

该问题不是 F11 全屏触发，而是窗口最大化时触发。关闭 Codex 设置中的“半透明侧边栏”后问题消失。