A bad forward path is generated by the OpenAM as the SAML SP

A bad forward path is generated by the OpenAM (SP) which set an original Assertion Consumer Service location.

This problem occurred only if an original assertion consumer service location is configured.
I encountered this problem, when I used an my original servlet which consumes the SAML assertion.

This servlet uses ^{com.sun.identity.saml2.profile.SPACSUtils.prepareForLocalLogin()} for getting a path used of a request forwarding.
But, prepareForLocation() returns a wrong URL below.

• http://auth.mydomain8080/UI/Login?org=/test

This URL is made by the code block below.

           if ((localLoginUrl == null) || (localLoginUrl.length() == 0)) {
               // shouldn't be here, but in case
               localLoginUrl =
                       SystemConfigurationUtil.getProperty(SAMLConstants.SERVER_PROTOCOL)
                       + "://"
                       + SystemConfigurationUtil.getProperty(SAMLConstants.SERVER_HOST)
                       + SystemConfigurationUtil.getProperty(SAMLConstants.SERVER_PORT)
                       + "/UI/Login?org="
                       + orgName;
           }

The comment says // shouldn't be here, but in case . However, my process have reached here in my environment.