Terminate and Redirect not working properly ISAPI 15.1.20

[PDSBILL]

Intraweb 15.1.20

Just upgraded from 15.1.9 to 15.1.20

When calling TerminateAndRedirect('http://somesite/someWebApp.dll?params') it works when run as .exe but does not go to the destination host when run as ISAPI dll

it shows current URL with ?params on browser nav bar

'http://currentsite/currentIntrawebApp.dll?params" it should be 'http://somesite/someWebApp.dll?params"

I saw this was a reported issue with prior versions of intraweb.

I am calling using Async event.
The Params are the correct params, but the host portion is not correct.

I created a simple test app with button and edit box.  Ran on my iis server on pasted url into edit box then clicked button
WebApplication.TerminateAndRedirect(IWEdit1.Text); 
It did not go to other app on same site.
It did go to another app on different host.
I tried relative url and it also did not work

Is there something I needed to do when upgrading other than install new version and recompile TMS components.