Running VIP Authentication Hub with the SiteMinder flow, the users are getting redirected to SSP base domain along with '/common/ui/v1/signin/default/ui/v1/signin/' path, which is duplicated.
VIP Authentication Hub has been upgraded to 3.1.
A hard-coded the base URL in the index.html file in a Custom Signin UI.
Switch to the out of the box VIP Authentication Hub Signin App with styling instead to fix this issue.