Linebreak bug when typing in Korean.

[tlonist-sang]

Expected

Linebreak should work properly when typing in Korean.

Observed

When a line break occurs during typing, the next line appears to be filled with identical characters, and it seems like no further input is being accepted. Specifically, when text wraps to a new line, that entire new line gets filled with duplicate characters and becomes unresponsive to additional typing.

Reproduced

1. Keep typing in Korean until the end of a line.
2. Do not break the line with enter, but continue writing.
3. The observed phenomenon occurs

2025-03-19.11.21.37.mov

Where did you see the bug

• OS: macOS
• OS version: Sonoma 14.3
• Browser (if applicable): Chrome
• Browser version (if applicable): 134.0.6998.89 (ARM64)
• Simplenote app version: 2.23.2 beta 1

Strangely, this does not happen in Safari.