pushNamedAndRemoveUntil bug? it doesn't remove as expected

[wyx....@gmail.com]

I am using the below code to remove all and push a new page

     Navigator.pushNamedAndRemoveUntil(

        context,

        '/dashboard',

       (Route<dynamic> route) => false,

      );

I expect after the call, the stack only has one routine, that is the new pushed page '/dashboard'.

But I got two, the first route is the '/login'.

Any idea why the code doesn't remove all previous routes in the stack?

thanks