RH-SSO 7.2 deployment in OpenShift 3.11 CORS not working

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We’re having an issue where the CORS header disappears somewhere on the way from the backend service back to the browser when using Keycloak/RH-SSO 7.2. Without Keycloak/RH-SSO 7.2, the CORS header is there and things function as expected.

SSO_ENABLE_CORS is set to true in the environment of the deployment of RHSSO pod but it's not doing anything. Is there a bug??

Getting "No 'Access-Control-Allow-Origin' header is present on the requested resource."