Redirect not working when transforming via Workers onError event

async function handleRequest(request) {
  let url = new URL(request.url);
  let options = { cf: { image: { onerror: 'redirect' }}};

  if (url.searchParams.has('width')) {
    options.cf.image.width = url.searchParams.get('width');
  }

  if (url.searchParams.has('fit')) {
    options.cf.image.fit = url.searchParams.get('fit');
  }

  if (url.searchParams.has('height')) {
    options.cf.image.height = url.searchParams.get('height');
  }
  
  const accept = request.headers.get('Accept');
  if (/image\/avif/.test(accept)) {
    options.cf.image.format = 'avif';
  } else if (/image\/webp/.test(accept)) {
    options.cf.image.format = 'webp';
  }

  const imagePath = url.pathname.slice(1);
  if (!imagePath) {
    return new Response('No image path specified', { status: 400 });
  }

  const imageRequest = new Request(`https://pub-8eca27df6a304971abd1fe716bc29b.r2.dev/files/${imagePath}`, { headers: request.headers });

  const response = await fetch(imageRequest, options);

  return new Response(response.body, { status: response.status, headers: response.headers });
}