Url in browser not updated after call of redirect( url_for('xxx' )) in Flask with jQuery mobile

I have a very simple python program using Flask shown below. It handles a login with a popup and logout. The problem is that the url in the browser is not updated by the redirect(url_for()) call. ``` @app.route('/') def index(): if not 'username' in session: # contains a button showing a login popup form with action set to '/login' return render_template('welcome.html') else: # contains a logout button with a href to '/logout' return render_template('webapp.html') @app.route('/login', methods=['POST']) def login(): session['username'] = request.form['username'] return redirect(url_for('index')) @app.route('/logout') def logout(): session.pop('username', None) return redirect(url_for('index')) ``` When accessing '/' the welcome page is shown. When I click on the button, the login popup is shown and its form action redirects to '/login'. This works and the login() function is called and executed. The redirect as well, but the browser doesn't update the displayed url. So the webapp page is shown with the /logon url. When I click reload I get an error because it tries to reload /logon while it should reload '/' where it has been redirected. The same happens with /logout. When the webapp page is shown and I click the logout button, the /logout page is loaded which executes the logout() function and redirects to index. But the url is left to logout. If I then reload the page, it succeeds because /logout accept the GET method and then the url is updated to / as it should have been in the first place. I have the impression it is a jQuery mobile issue, but can't find out the problem. From the python and Flask point of view it matches all login examples I could find.