Why is only main.scss (gulp) tracking?

Question

gulp.js

gulp.task("watch",["browser-sync", "css-libs", "scripts"], function() {
  gulp.watch("app/sass/**/*.scss", ["sass"]);
  gulp.watch("app/*.html", browserSync.reload);
  gulp.watch("app/js/**/*.js", browserSync.reload);
});

Tell me why when changing Scss or Sass files (except for main.scss)
browserSync does not update the page, despite the fact that everything is fine with html.
If you need another piece of code for the answer, I can throw it off.