Gulp 4 BrowSersync not refreshing the webpage when SCSS files changed - gulp

Question

I just started to use Gulp with BrowserSync.
Please, help me with following issue: When I save my SCSS files BrowserSync not refreshes the webpage but saves files OK. Here is what happening in the console:
[21:37:48] Starting 'css'...
[Browsersync] 1 file changed (main.min.css)
[21:37:48] Finished 'css' after 206 ms
So no message
"[Browsersync] Reloading Browsers..."
This problem only with SCSS files, JS and HTML work correctly. Here is my gulpfile.js:
let project_folder = require("path").basename(__dirname);
let source_folder = "#src";
let fs = require('fs');
let path = {
build: {
html: project_folder + "/",
css: project_folder + "/css/",
js: project_folder + "/js/",
img: project_folder + "/images/",
fonts: project_folder + "/fonts/",
},
src: {
html: [source_folder + "/*.html", "!" + source_folder + "/_*.html"],
css: source_folder + "/styles/main.scss",
js: source_folder + "/js/main.js",
img: source_folder + "/images/**/*.{jpg,png,svg,gif,ico,webp}",
fonts: source_folder + "/fonts/*.{ttf,otf,woff,woff2}",
},
watch: {
html: source_folder + "/**/*.html",
css: source_folder + "/styles/**/*.scss",
js: source_folder + "/js/**/*.js",
img: source_folder + "/images/**/*.{jpg,png,svg,gif,ico,webp}"
},
clean: "./" + project_folder + "/"
}
let { src, dest } = require('gulp'),
gulp = require('gulp'),
browsersync = require("browser-sync").create(),
include = require('gulp-include'),
del = require("del"),
scss = require("gulp-sass"),
autoprefixer = require("gulp-autoprefixer"),
group_media = require("gulp-group-css-media-queries"),
clean_css = require("gulp-clean-css"),
rename = require("gulp-rename"),
uglify = require("gulp-uglify-es").default,
imagemin = require("gulp-imagemin"),
webp = require('gulp-webp'),
webphtml = require('gulp-webp-html'),
webpcss = require("gulp-webpcss"),
svgSprite = require('gulp-svg-sprite');
function browserSync(params) {
browsersync.init({
server: {
baseDir: "./" + project_folder + "/"
},
port: 3000,
notify: false
})
}
function html() {
return src(path.src.html)
.pipe(include())
.pipe(webphtml())
.pipe(dest(path.build.html))
.pipe(browsersync.stream())
}
function css() {
return src(path.src.css)
.pipe(
scss({
outputStyle: "expanded"
})
)
.pipe(
group_media()
)
.pipe(
autoprefixer({
overrideBrowserslist: ["last 5 versions"],
cascade: true
})
)
.pipe(webpcss())
.pipe(dest(path.build.css))
.pipe(clean_css())
.pipe(
rename({
extname: ".min.css"
})
)
.pipe(dest(path.build.css))
.pipe(browsersync.stream())
}
function js() {
return src(path.src.js)
// .pipe(fileinclude())
.pipe(include())
.pipe(dest(path.build.js))
.pipe(
uglify()
)
.pipe(
rename({
extname: ".min.js"
})
)
.pipe(dest(path.build.js))
.pipe(browsersync.stream())
}
function images() {
return src(path.src.img)
.pipe(
webp({
quality: 70
})
)
.pipe(dest(path.build.img))
.pipe(src(path.src.img))
.pipe(
imagemin({
progressive: true,
svgoPlugins: [{ removeViewBox: false }],
interlaced: true,
optimizationLevel: 3 // 0 to 7
})
)
.pipe(dest(path.build.img))
.pipe(browsersync.stream())
}
function fonts() {
return src(path.src.fonts)
.pipe(dest(path.build.fonts));
};
gulp.task('svgSprite', function () {
return gulp.src([source_folder + '/iconsprite/*.svg'])
.pipe(svgSprite({
mode: {
stack: {
sprite: "../icons/icons.svg", //sprite file name
example: true
}
},
}
))
.pipe(dest(path.build.img))
})
function watchFiles(params) {
gulp.watch([path.watch.html], html);
gulp.watch([path.watch.css], css);
gulp.watch([path.watch.js], js);
gulp.watch([path.watch.img], images);
}
function clean(params) {
return del(path.clean);
}
let build = gulp.series(clean, gulp.parallel(js, css, html, images, fonts));
let watch = gulp.parallel(build, watchFiles, browserSync);
exports.fonts = fonts;
exports.images = images;
exports.js = js;
exports.css = css;
exports.html = html;
exports.build = build;
exports.watch = watch;
exports.default = watch;