[Q] Galaxy S4 random rebooting after installing CWM topic

I hava a Galaxy S4 GT-i9505 and yesterday i rooted it and installed CWM 5.X.X.X
but now it keeps randomly crashing, it happened while browsing, while using snapchat and watching photos but also while just watching home screen.
When it crashes it freezes for a moment and then shows samsung logo and after a while it is back up and shows my unlock screen wich i dont have to fill in my Pincode like i have to do when i reboot or boot my phone manualy.

I have updated CWM to 6.0.4.7 but still it is crashing

I am running stock 4.4.2 android only CWM and SuperSU

I have searched for a similair problem but couldnt find anything