Comments are removed even with `minify: false`

I have seen that any input with comment is output without comments even when minification is disabled :

const css = require("@parcel/css");

const inputs = [
  "/* before */ rule { c: 1 } /*! after */",
  `/* before */
            rule { d: 1 }
            /*! after */`
];

inputs.forEach((input) => {
  const { code } = css.transform({
    filename: "",
    code: Buffer.from(input),
    minify: false
  });

  console.log({
    input,
    output: code.toString()
  });
});

Results in

{
  input: '/* before */ rule { c: 1 } /*! after */',
  output: 'rule {\n  c: 1;\n}\n'
}
{
  input: '/* before */\n            rule { d: 1 }\n            /*! after */',
  output: 'rule {\n  d: 1;\n}\n'
}

For most comments that shouldn't be a problem, but if the comment starts with /*! in general it should be preserved as it is used for licenses or other content that was specifically marked to remain in the code.

Is there a way to keep those comments ?

Reproduce the JavaScript transform example with minify: false and inspect the Rust parser or minifier code responsible for comment handling. Confirm the expected behavior for ordinary comments and /*! comments, then add regression coverage showing that marked comments are preserved when minification is disabled.