I suggest to update the login page with a confirmation notification, after an user logs in. When an user logins via this page and hits the ‘login’ button, the only feedback he gets: you see your profile icon in the menu at the top.
1. After hit the ‘login’ button, return to the page before. Is this the entry page, go to the homepage 2. After login, stay on the login page and show a confirmation notification banner which you add to Phrases, so a Community can personalize this message themselves.
