WriteConsoleOutputW is broken on Windows 10

wc.c

#include <windows.h>
#include <stdio.h>

int
main(int argc, char* argv[]) {
	HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE);
	CHAR_INFO ci[3] = {};
	COORD buffer_size = { 3, 1 };
	COORD start_coord = { 0, 0 };
	SMALL_RECT sr = { 0, 0, 80, 25 };
	SHORT white = FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED;

	ci[0].Char.UnicodeChar = L'あ';
	ci[0].Attributes = white;
	ci[1].Char.UnicodeChar = L'い';
	ci[1].Attributes = white;
	ci[2].Char.UnicodeChar = L'う';
	ci[2].Attributes = white;
	WriteConsoleOutputW(h, (CHAR_INFO*)ci, buffer_size, start_coord, &sr);	
	return 0;
}

This code above is broken. Below should work correctly.

#include <windows.h>
#include <stdio.h>

int
main(int argc, char* argv[]) {
	HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE);
	CHAR_INFO ci[6] = {};
	COORD buffer_size = { 6, 1 };
	COORD start_coord = { 0, 0 };
	SMALL_RECT sr = { 0, 0, 80, 25 };
	SHORT white = FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED;

	ci[0].Char.UnicodeChar = L'あ';
	ci[0].Attributes = white | COMMON_LVB_LEADING_BYTE ;
	ci[1].Char.UnicodeChar = L'あ';
	ci[1].Attributes = white | COMMON_LVB_TRAILING_BYTE ;
	ci[2].Char.UnicodeChar = L'い';
	ci[2].Attributes = white | COMMON_LVB_LEADING_BYTE ;
	ci[3].Char.UnicodeChar = L'い';
	ci[3].Attributes = white | COMMON_LVB_TRAILING_BYTE ;
	ci[4].Char.UnicodeChar = L'う';
	ci[4].Attributes = white | COMMON_LVB_LEADING_BYTE ;
	ci[5].Char.UnicodeChar = L'う';
	ci[5].Attributes = white | COMMON_LVB_TRAILING_BYTE ;
	WriteConsoleOutputW(h, (CHAR_INFO*)ci, buffer_size, start_coord, &sr);	
	return 0;
}