Months later the mouse got worse. First it kept disconnected from less than a second, really frustrating if you want to play games with a gaming mouse. Then it got to the point where it remained disconnected till I had to disconnect the USB cable from the computer and reconnected. Then it worked again randomly. One day the mouse would just do this multiple times and hour, other days no issue.
I've made sure to test the mouse on two other computers and got the same result.
A complete and shameful failure and no answer here from Asus is really disappointing.
I didn't knew at the time but this mouse is always on sale and is not promoted by Asus. They knew it has issues.
STAY AWAY FROM THIS MOUSE, even better get some other brand.
I've ended the struggle by buying a Logitech G603 that works perfectly.