The gateway connect randomly to the backed on port 8080 while the service is setup to connect to port 80 using the "route to http" assertion.
Other services are supposed to use port 8080 but this one should not .
Release : 9.4
Component : API GTW
The Host request-header field specifies the Internet host and port number of the resource being requested, as obtained from the original URI given by the user or referring resource (generally an HTTP URL,
as described in section 3.2.2). The Host field value MUST represent the naming authority of the origin server or gateway given by the original URL. This allows the origin server or gateway to differentiate between internally-ambiguous URLs, such as the root "/" URL of a server for multiple host names on a single IP address.
Host = "Host" ":" host [ ":" port ] ; Section 3.2.2