[keycloak-user] login-status-iframe.html returning 403 with init parameters

I am trying to use the keycloak js adapter to manage the OIDC session. I am able to load the login-status-iframe.html page by itself when not using any init parameters. However, when the init parameters are added: login-status-iframe.html/init?client_id=someclient&origin=https%3A%2F%2Flocalhost%3A8443, the iframe receives a 403 response.