Comments only media query are removed

[matori]

When non-nested media query contains block comments only, that media query block are removed.

@media (min-width: 640px) { 
  /* comment */
}

div {
  @media (min-width: 320px) { 
    /* comment */
  }
}

libsass compile result

@media (min-width: 320px) {
  div {
    /* comment */
  }
}

ruby-sass 3.4 compile result

@media (min-width: 640px) {
  /* comment */
}
@media (min-width: 320px) {
  div {
    /* comment */
  }
}

[xzyfer]

Thanks for the report @matori