Cubase11 problem audio fade out

cubase11 problem when I play track the audio fade out for a few seconds and then fade in, and do this in a loop, I think the problem is related to my nvidea card its a 2060 all drives are updated, is ther a way to desable 3d hardwar aceleration for cubase?
using cubase elements 11.0.40, windows 11,
I try cakewalk and it woks fine

Hi and welcome to the forum,

Make sure, there is no plug-in in DEMO or Trial mode installed/used, please.

thanks man I disable all plugins and it work