[macOS] ChatGPT composer text/background rendering appears vertically flipped

Summary

In the ChatGPT for macOS composer, the Chinese placeholder/helper text is rendered with an apparent vertically reflected duplicate/underlay. The reflected glyphs appear immediately above the normal text, making the input area look visually corrupted.

Environment

• ChatGPT for macOS: 26.810.41047 (build 6570)
• macOS: 26.5.2
• Architecture: arm64

Steps to reproduce

1. Open ChatGPT for macOS.
2. Open a new or existing ChatGPT conversation.
3. Focus the composer at the bottom of the window.
4. Observe the Chinese text rendered near the top-left of the composer.

Expected behavior

Composer text should render once, upright, and without a reflected or inverted ghost layer.

Actual behavior

The composer shows what appears to be a vertically flipped/reflected copy of the text above the normal characters.

Evidence

A screenshot was captured at the time of the report. It shows the affected composer text; the relevant section is the bottom-left of the input field.

Notes

• This report intentionally does not claim persistence across restarts or a specific trigger beyond the captured state.
• I can provide the original screenshot or additional reproduction details if needed.

Start by reproducing the issue in the ChatGPT for macOS composer using the listed environment and steps, then compare the affected bottom-left input area with the supplied screenshot. The work is done when Chinese composer text renders once, upright, and without the reflected or inverted ghost layer.