Korean IME input issue: Only consonants are entered

[HodooSeungMo]

Hello,

I'm experiencing an issue with Korean input when using the react-spreadsheet library.

Issue description:

• When typing in Korean, only the initial consonants are entered, and the rest is ignored.
• For example, when trying to input "안녕하세요", it results in "ㅇㅏㄴ녕하세요".

Steps to reproduce:

1. Create a spreadsheet using react-spreadsheet.
2. Select a cell and try to input Korean text.

Expected behavior:

• Korean text should be entered normally. ("안녕하세요")

Actual behavior:

• Only initial consonants are entered. ("ㅇㅏㄴ녕하세요")

Any help or advice to resolve this issue would be greatly appreciated.