gulp.watch not works if watched glob contains Japanese characters folder name

• gulp: 4.00
• node: 8.9.4
• npm: 5.8.0
• OS: macOS 10.12.6

gulpfile.json

const gulp = require('gulp');
const watchGlob = 'folder/**/*';

gulp.task('test', () => {
    gulp.watch(watchGlob, (done) => { done() })
            .on('change', (path) => {
                console.log(`File ${path} changed.`);
            });
});

run test task and change folder/foo file result output is:

Starting 'test'... File folder/foo changed. Starting ''... Finished '' after 1.45 ms

change watchGlob

const watchGlob = 'フォルダ/**/*';

run test task and change フォルダ/foo file. result output is:

Starting 'test'...