nopCommerce 2.8 infinate loop when SSL Enabled on cloud server

Is there anybody facing an issue when enabled SSL on cloud server. I've been trying to modify the code but seem not working.

var currentConnectionSecured = filterContext.HttpContext.Request.IsSecureConnection; <-- always return false although the browser shown https://

therefore I tried to change the code as below

var currentConnectionSecured = filterContext.HttpContext.Request.ServerVariables["HTTP_CLUSTER_HTTPS"] == "on";

or

var currentConnectionSecured = filterContext.HttpContext.Request.ServerVariables["Use_HTTP_X_FORWARDED_PROTO"] == "on";

but still return false. Then I tried get the AbsoluteUri but it return http:// although the browser show https://.

Does anybody facing the same issue?