Reply to S4 and X1 issues

Recently I've noticed that if I use Traktor for longer 20min or so the button functions of my X1 and S1 start to go out. By go out I mean I can't control traktor at all with them unless I unplug the USB ports and re plug them in. This is troublesome especially when I'm performing live. I noticed the problem after I upgraded my drivers and software.

I was goi g to rollback my software but should I also rollback the drivers as well? Thanks.

Also anyone else experiencing this? How did you fix it if you did.