Broke sequence

[Air-Petr]

I have some strange behavior after combining queries. Look at those images:

• before combine:
• after:

See the sequence has broken. My task is:

gulp.task('sass', function() {
  return gulp.src('sass/**/*.s+(a|c)ss')
    .pipe(sass())
    .pipe(cmq())
    .pipe(gulp.dest('css'))
});

Why this can be? I don't know what I'm doing wrong.