and now when running curl -I ... on the problem server I am getting:
HTTP/2 200
server: nginx
date: Mon, 30 Oct 2023 06:44:47 GMT
content-type: application/json
content-length: 752
cache-control: public, max-age=0, no-cache
replay-nonce: drGA4aWAOgyLEoqwBvKffbFnXo2_CZY1Sbj3JncVR77Pa_AZVSw
x-frame-options: DENY
strict-transport-security: max-age=604800