DDJ RR breaking sound after same time playing

After two hours of playing, the sound starts to stop and it has some kind of noise, as if a Crush effect was applied to it. After two hours there is a real break in the sound, but before that, it already shows flaws in a few moments. I already tried to increase the size of the buffer, but I did not succeed.

I'm desperate because I need my DDJ RR for work. Please, I'm waiting for a solution. I noticed that in the forum there are several users reporting the same problem.