Substitution performed when accepting a Kanji conversion of Japanese input method

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: Version: 1.83.0 (Universal) Commit: e7e037083ff4455cf320e344325dacb480062c3c
• OS Version: macOS 13.5.2（22G91）

Steps to Reproduce:

1. Setup Japanese keyboard. Add 日本語 - ローマ字 (Japanese - Romaji) keyboard to your environment. For details, see Set up a Japanese input source on Mac.
2. Disable live conversion. For details, see the section Use traditional conversion in Enter Japanese text using a Japanese input source on Mac.
3. Create new text file and paste the following text to multiple lines:

   これを置換したい。
   

4. Open the Find & Replace box. (Select "Edit > Replace" in menu.)
5. Click the Find field.
6. Switch to Japanese keyboard. (⌃⇧J)
7. Type korewo. The input text would be これを with underline, which shows the text has not been accepted yet.
8. Type ↵ (return key). The input text is accepted without conversion.
9. Type chikanshi. The input text would be ちかんし with underline.
10. Type ␣ (space bar). The input text would be converted to 置換し.
11. Type ↵. The input text is now accepted.
12. Type ⇥ (tab key). The focus is now on the Replace field.
13. Type korewo. The input text would be これを with underline.
14. Type ↵ to accept.
15. Type okikae. The input text would be おきかえ with underline.
16. Type ␣ to convert. The input text would be converted to 置き換え.
17. Type ↵ to accept.
18. Type ↵ to execute the replacement.

The above steps show a typical example of Japanese input; note that the return key is used both to accept the conversion and to execute the process (in this case, replacement).

Expected result:

Replacements are performed only if there is no unaccepted text.

Actual result:

When a conversion is accepted, replacement is performed at the same time.

https://github.com/microsoft/vscode/assets/1079715/729b6538-5cf1-4946-9a77-89072d31e5a9