So since the marshmallow update I've had a lot of problems. Being unrooted I've been reluctant to wipe as one of the problems I've had is that the xperia backup was bugged out. Finally I bit the bullet. Spent hours trying different methods to backup with no avail. Was going to wipe with no backup but then thought why not try Helium. I wasn't expecting it to work as they even say in their description that it doesn't work with Xperias. It backed up my apps and data to Box and restored them without any problems. Can't say if it backs up the phone settings too as I was also having troubles connecting my phone to my PC as it kept reconnecting every minute. So if you're having problems like me give helium a try 
