Bug: For multi-byte characters like Chinese, some output encodings can cause incorrect text rendering.

[abgox]

Windows Terminal version

1.21.3231.0

Windows build number

10.0.22635.0

Other Software

PowerShell

Steps to reproduce

• I cleared the contents of $profile，and added a test function in $profile.

  function test-render() {
      $text = @("你好你好你好", "😄😎🤔")
  
      $buffer = $Host.UI.RawUI.NewBufferCellArray($text, 'Cyan', 'Black')
      $Host.UI.RawUI.SetBufferContents($Host.UI.RawUI.CursorPosition, $buffer)
  
      $null = $host.UI.RawUI.ReadKey() # Suspend the process for easy observation
  }

• There are two text rendering issues here.

---

1. Emoji does not render properly in Windows Terminal Preview, but it works fine in ohter terminals like Windows Terminal,Tabby,Hyper.

Note

I'm in China, so the encoding of Windows Terminal (Preview) is automatically changed to GB2312.

But ohter terminals like Tabby and Hyper are using UTF8 encoding.

---

2. When the output encoding is switched to UTF8, Windows Terminal (Preview) has unexpected behavior in rendering Chinese or other multi-byte characters, but it works fine in other terminals like Tabby,Hyper.

Note

other terminals like Tabby,Hyper works fine because they always use UTF8 encoding.

• I switched to UTF8 with this regional setting.

  

Expected Behavior

1. Emoji can render properly in Windows Terminal Preview.
2. For multi-byte characters like Chinese, render it correctly and should not add spaces by mistake.

Actual Behavior

1. Emoji can't render properly in Windows Terminal Preview.
2. For multi-byte characters like Chinese, spaces are added incorrectly.