We just updated our beta site to version 2.2.8 and since the update, the login link requires two clicks. the first click appears to call a script
/login/?_xfRequestUri=%2Ftestxf2%2F&_xfWithData=1&_xfToken=1643222451%2Cfffc98edeb8b6e411e4e43ad1d464edc&_xfResponseType=json
which return a redirect...