flash: Deno.serve drops response body chunks if empty chunk is enqueued

[kt3k]

The following example responses with "a". This should response with "ab" instead. (note: If you commented out the 2nd enqueue() call, it responses with "ab".)

Deno.serve(() => {
  const body = new ReadableStream({
    start(controller) {
      controller.enqueue(new Uint8Array([97]))
      controller.enqueue(new Uint8Array([]))
      controller.enqueue(new Uint8Array([98]))
      controller.close();
    }   
  }); 
  return new Response(body);
});

This seems indirectly causing the issue in support of npm:astro. ref:

• fix: astro dev #17110
• Support Astro #16659

[bartlomieju]

This issue has been fixed in #18568