Steps to reproduce:
1. In Brave or other Chromium-based browser, go to address bar (Control+L).
2. Write the following string without quotes (if copy-pasting, you have
to manually type the javascript: prefix): "javascript:alert('first
line\nSecond line');", and press Enter.
3. When NVDA/browser says something like "message from the page...",
press NVDA+Numpad 9 to examine the last line of the alert dialog.
4. Go to end of that line by pressing NVDA+End.
5. Now, when you try to move to the right with Numpad 3, NVDA should
announce the right edge. Instead, it only says the last character on
that line.
Regards,
Veli