To reproduce:
- Press Shift+F4 to create a file named "好.md" (w/o the quotation marks), and keep the dialog box open. You can copy and paste this string, or use another string that contains a CJK character.
- Press Ctrl+Shift+Left to select the "md" part.
- Press Left. The expected caret position is between "." and "m", but the actual position is between "m" and "d".