Codex Windows app: parts of the UI disappear or become transparent when the window is maximized at 1920x1080

Description

When I maximize the Codex desktop app on Windows at Full HD resolution, parts of the interface are not rendered correctly.

The affected areas include the chat sidebar and the Files UI. Some parts of the application window become transparent or disappear, exposing the Windows desktop behind the app.

Steps to reproduce

1. Launch the Codex desktop app on Windows.
2. Use a display with resolution set to 1920x1080.
3. Maximize the Codex window.
4. Observe that parts of the interface disappear or are rendered as transparent areas.

Expected behavior

The entire Codex interface should remain visible and render correctly when the window is maximized.

Actual behavior

Parts of the app surface are missing or transparent. The chat sidebar and Files-related UI may disappear or render incorrectly.

Environment

• Codex app package version: 26.527.3686.0
• Codex Chromium file version: 148.0.7778.179
• OS: Windows 10 Home 22H2, 64-bit
• OS build: 19045.6456
• GPU: NVIDIA GeForce RTX 4060
• NVIDIA driver version: 610.47
• Windows driver version: 32.0.16.1047
• Driver date: 2026-05-19
• CPU: Intel Core i5-10400F
• RAM: 15.92 GB
• Displays: Mi 27 NFGL and HP 27m
• Display setup: two extended displays, each 1920x1080
• Reported active mode: 1920x1080 at 60 Hz
• Windows scaling: 100% (96 DPI)
• Taskbar position: top of the screen

Additional information

The issue was observed after installing the currently active NVIDIA driver.

A screenshot is available but was not included in this automated submission because the attached chat image cannot be uploaded through the GitHub connector.