STR:
Open a file.
Place the caret at line 3.

Run that file from the command-line with -n-1.
-- The caret remains at line 3.

Run that file from the command-line with -n-2.
-- The caret is at line 0.

Expected:
The same result in both cases.

Notepad++ v7.9.1 (32-bit)
Build time : Nov 2 2020 - 01:03:56
Path : C---\notepad++.exe
Admin mode : ON
Local Conf mode : ON
OS Name : Windows 7 Enterprise (32-bit)
OS Build : 7601.23964
Current ANSI codepage : 1255
Plugins : ComparePlus.dll HTMLTag_unicode.dll MenuIcons.dll PythonScript.dll _CustomizeToolbar.dll