MAC encoding in cyrillic Windows

Сергей Зеленовский

I work in the Russian version of windows. And I type the text file in cp1251 - the standard cyrillic encoding of windows. Why will Notepad ++ open it in MAC encoding? Moreover, if I explicitly specify the cp1251 encoding, the next time the file is still opened in MAC encoding. I don’t understand what relation the MAC encoding has to the window system and windows program, where does it come from ?!
Example (in cp1251):
Планы на МЕСЯЦ

01.09.19
13.00 Совсибирь
02.09.19
13.00 Совсибирь, Лена расчетчица

Opened text:
ѕланы на ћ≈—я÷

01.09.19
13.00 —овсибирь
02.09.19
13.00 —овсибирь, Ћена расчетчица

Ekopalypse

@Сергей-Зеленовский

Npp tries to find out which file has been encoded how by using the mozilla chardet library.
This setting is configured via
Settings->preferences->misc.->autodetect character encoding
I would uncheck it, if you have issues with it.

Сергей Зеленовский

Thank, works. So, for my example, the mozilla chardet library does not work correctly.