Yo vicled,this should fix ur problem...
I used v17 but i noticed that YES i have SuperSU and YES it rooted BUT,when i used an app that needed root access it would freeze up..and bug up and root apps wouldnt work..(Heres why)its a full root but you need to go into the app drawer and open supersu and then go to options and have it AUTOMATICALLY GRANT ROOT ACCESS,also turn off the ACCESS SPLASH SCREEN THAT IS SUPPOSED TO POP UP.i noticed thats why it glithed because the screen wouldnt pop up to let you choose grant access.