I am using AEM 6.5 author instance. After login authentication, i have tries several ways to redirect new page. I can see in response, landing page is coming but does not reload in the browser. In the end, login page remains in browser.
You are including response of target page,you should either redirect or forward.
The main difference is that when you use forward the control is transferred to the next servlet/jsp you are calling, while include retains the control with the current servlet, it just includes the processing done by the calling servlet/jsp(like doing any out.println or other processing).