Korean output is garbled only in Composer 2

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Hi, I found a reproducible issue where Korean output is garbled only when using Composer 2.

Issue

When I ask a question in Korean using Composer 2, the response text is corrupted and shows many broken replacement characters.
My Korean input displays correctly, but the Composer 2 output does not.

Reproduction Steps

  1. Open Cursor
  2. Select Composer 2
  3. Ask a short question in Korean
  4. The response appears garbled

Expected Behavior

Korean output should render normally.

Actual Behavior

Only the Composer 2 response is broken.
If I switch to GPT in the same environment, Korean output displays normally.

Notes

  • This is reproducible even with very short Korean prompts
  • User input is displayed correctly
  • I attached a screenshot: composer2-korean-text-broken.png
    I can provide a Request ID if needed.

Steps to Reproduce

  1. Open Cursor
  2. Select Composer 2
  3. Ask a short question in Korean
  4. The response appears garbled

Screenshots / Screen Recordings

composer2-korean-text-broken.png
composer2-korean-text-broken.png1018×770 53.1 KB

Operating System

MacOS

Version Information

Environment

  • Cursor Version: 3.0.16
  • VSCode Version: 1.105.1
  • macOS: 26.4 (25E246)

Does this stop you from using Cursor

No - Cursor works, but with this issue

5

A post was merged into an existing topic: [BUG]Korean characters broken (encoding issue) in Composer/Agent