// raw set scoped
.hello{
  &-title{
     color:red;
  }
}

// expect
.hello-title[data-v-7578cda5] {
  color: red;
}

// preprocessLang is not set
.hello[data-v-7578cda5] {
  &-title[data-v-7578cda5] {
    color: red;
  }
}
// to
.hello[data-v-7578cda5]-title[data-v-7578cda5] {
  color: red;
}