Reply to Kontrol x1 play button issues

Hello, people

I have a problem with one of my Native Instruments Traktor kontrol x1 units. When I press the play button on track deck B it does not react, sometimes I have to press it several times and push down hard for it to respond. I have contacted NI support and they recommend getting the latest updates and i have.

does anybody have this same issue and if so what is your advice on how to fix it ?