How to trigger browser refresh after twig build?

Question

Twig

For all other tasks, the update is successful, and only after the twig build does the build itself pass (the files are updated), but the page does not automatically reload. What could be the problem?
Below is a piece of gulpfile.js

var browserSync = require('browser-sync'),
reload = browserSync.reload;

gulp.task('twig:build', function () {
  return gulp.src(path.src.twig)
  .pipe(plugin.data(getData))
  .pipe(plugin.twig())
  .pipe(gulp.dest(path.build.html))
  .pipe(reload({stream:true}));
});

gulp.task('watch', function(){
gulp.watch(path.watch.twig, function() {
    gulp.start('twig:build');
  });
})