Rapid fire requests that never complete

[edgrosvenor]

This might be a misconfiguration on my part, but I don't even know where to start looking. Any attempt to use expose results in rapid fire requests (>1 per second) that never actually complete. Below you can see the x-forwarded-for record is just an ever-growing list of my IP address. There is no response.

$headers = [
    'Host' => 'film.a.gro.sv',
    'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:92.0) Gecko/20100101 Firefox/92.0',
    'Accept' => 'text/html, application/xhtml+xml, application/xml;q=0.9, image/webp, */*;q=0.8',
    'Accept-Encoding' => 'gzip, deflate, br',
    'Accept-Language' => 'en-US, en;q=0.5',
    'sec-fetch-dest' => 'document',
    'sec-fetch-mode' => 'navigate',
    'sec-fetch-site' => 'none',
    'sec-fetch-user' => '?1',
    'TE' => 'trailers',
    'upgrade-insecure-requests' => '1',
    'x-expose-request-id' => '614c9e20bb48e',
    'x-exposed-by' => 'Expose 2.0.0-beta',
    'x-forwarded-for' => '73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148, 73.36.12.148',
    'x-forwarded-host' => 'film.a.gro.sv',
    'x-forwarded-proto' => 'https',
    'x-original-host' => 'film.a.gro.sv',
];