I've not noticed any issues on mine. Works like it always has.
i was thinking of doing a factory reset...just to be sure it wasnt me messing things up.
I'm not seeing a issue, but before you factory reset try going to the app drawer and long press secure folder app and clear cache and force stop see if it helps.
i did that, but i'm still having the same issue
Then try clear data but back up everything then restart see if that helps.