Default [Q] Screen freezes

I've had my LG G2 for a couple of months now but a couple of weeks ago my screen started freezing and becoming unresponsive. It doesn't happen every time I use it, just now and again. When it freezes I can turn the screen off and then back on and everything works OK. Has anyone else encountered this problem? I live in Thailand and see where we are supposed to be getting our KitKat update in a couple of weeks and I am waiting to install that and see if it will fix the problem.