EBSAccessGate Logout throws warning - No langcode on the logout URL

Hi Experts,

I am getting this warning message when the user logs out the EBS via EBSAccessgate logout call.

<Warning> <oracle.apps.fnd.ext.common.server.FndSsoLogout> <BEA-000000> <No langcode on the logout URL, maybe someone is phishing. Fallback to lagCode=US>
Dec 18, 2012 11:52:53 AM oracle.apps.fnd.ext.common.server.FndSsoLogout logout

Debugging this leads to the fact that during the logout process, it uses query string as follows

https://ebsagate.domain.com/ebs/ssologout.do?returnUrl=https://appsserver.domain.com/OA_HTML/AppsLogin?langCode=US?langCode=US

As you can see  there are two langCode with "?langCode=US?langCode=US"  and I think this cause this warning.  Anyone had experienced this issue.