not work with gulp watch

[TangMonk]

function js_files() {
    return src('./assets/scripts/*.js')
        .pipe(dest('./public/scripts'))
        .pipe(rev())
        .pipe(dest('./public/scripts'))
        .pipe(rename({
            dirname: "/scripts/"
        }))
        .pipe(rev.manifest('public/rev-manifest.json',{
            merge: true,
            base: './public'
        }))
        .pipe(dest('./public/'))
}

function defaultTask(cb) {
    watch('./assets/scripts/*.js', {ignoreInitial: false}, js_files)
}

exports.default = defaultTask;

It manifest only changes when first run npx gulp, then it not changed whenever I change my source js file.

Please look at the following screen record(the gif the bit large, please patient):

imgur

[benbieler]

Still an issue?