Cursor is incorrectly positioned on reflow of cursor line

[LarryWu1]

reflowCursorLine was added as part of #5234. When this option is enabled, the text on the cursor line reflows but the cursor is mispositioned. See the images below:

Initial position:

After text wrapping to new line:

After unwrapping text to previous line

Details

• Browser and browser version: Brave v1.73.105
• OS version: Windows 11 Home Version 10.0.22631 Build 22631
• xterm.js version: 5.6.0-beta.96

Steps to reproduce

1. Initialize a terminal with reflowCursorLine set to true
2. Resize the terminal