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

• VS Code Version: 1.63.0
• OS Version: macOS Monterey 12.0.1
• Locale: en and ja

Steps to Reproduce:

1. Input the following code:

`
！＂＃＄％＆＇（）＊＋，－．／
０１２３４５６７８９：；＜＝＞？
＠ＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯ
ＰＱＲＳＴＵＶＷＸＹＺ［＼］＾＿
｀ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏ
ｐｑｒｓｔｕｖｗｘｙｚ｛｜｝～
`

2. Change language mode to JavaScript.

Expected result:

• All fullwidth characters are highlighted.
• A tooltip shows its counterpart character.

Actual result:

• Some characters are not highlighted.

• Some tooltips show characters not so similar.

  • The character U+ff3b "［" could be confused with the character U+0028 "(", which is more common in source code.

  • The character U+ff3d "］" could be confused with the character U+0029 ")", which is more common in source code.