STR:
Settings -> Preferences -> General -> Localization: select a RTL language (e.g. Hebrew).
Restart NPP.
Open files A and B.
Move A to other view.
Drag & Drop a file into the current view in NPP.

Result:
The file is opened in the other view.

Notepad++ v7.8.9 (32-bit)
Build time : Jul 15 2020 - 20:26:50
Path : C:---\Downloads\npp.7.8.9.bin\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 : mimeTools.dll NppConverter.dll NppExport.dll