Why cmd.exe not printing first letter of utf8 string from utf8 c++ encoded program on Win10?

I just wonder simple problem on windows in cmd.exe console program. I write simple one file program in c++ in utf8 encoding:

// utf8 source file encoding
#include <iostream>
#include <iomanip>

int main() {
    // compile and run on windows 10 and change code page to utf
    // execute from cmd.exe
    // WHY first letter 'П' - first time not printed? But after space printed?
    std::system("chcp 65001>nul");
    const char* utf8 = u8"Привет Мир";  // this will skip first letter with MinGW compiler
    const char* utf8s = u8" Привет Мир"; // this will print nice!!! Just add space
    std::cout << "cout\n";
    std::cout << utf8 << std::endl;
    std::cout << utf8s << std::endl;
    std::cout << utf8 << std::endl;
    std::cout << std::flush;
    std::wcout << L"wcout\n";
    std::wcout << L"Привет Мир" << std::endl;
    std::wcout << L" Привет Мир" << std::endl;
    std::wcout << L"Привет Мир" << std::endl;
    std::wcout << std::flush;
    std::printf("printf\n");
    std::printf("%s\n", utf8);
    std::printf("%s\n", utf8s);
    std::printf("wprintf\n");
    std::wprintf(L"Привет Мир\n");
    std::wprintf(L" Привет Мир\n");
    std::wprintf(L"Привет Мир\n");
    std::fflush(stdout);
    std::system("pause");
    return 0;
}

Output from cmd.exe

Output form git-bash.exe This programs outputs nice on windows 10 in git-bash.exe but in cmd.exe with Lucida Console font and even with chcp 65001 still not printing first letter of Russian "Hello World" -> "Привет Мир". I try compile this code with MinGW 7.1 and with MSVC2017 but nothing changed. I know that rustc.exe(Rust Lang compiler) produce binary files that works in cmd.exe and in git-bash.exe too with utf8 text printing. How to do it in C++ program on windows? Thanks in advance.