For fun I went back just now and tried running curl --user elastic:<password> "https://<clusterid>.us-east-1.aws.found.io:9243/
along with curl --user logstash:<password> "https://<clusterid>.us-east-1.aws.found.io/9243" and have found that both commands hangs whenever I am experiencing this issue that I had in a previous thread I posted. It seems that issue still is occurring on my end and I have not been able to get the error to consistently occur.
In addition, if I run a command like curl -L google.com (-L for redirecting since omitting the -L will just result in a 301) I receive html as expected.