Is it possible, and don't let this question frustrate anyone... but is it possible that what is sometimes being described as "slip" is just people adjusting to a new type of transmission? In the past, some of the complaints were based on expectations and the FEEL of a rubber belt driven system that people are used to, as is in other Rangers and side by sides in general. Comparing sport mode and comfort mode can cause perhaps a sensation of "slip", with the higher RPM behavior; this has been shown and explained in Polaris videos. I'm genuinely curious as someone who hasn't experienced this issue, how do you know it's slipping?
Clutch pressure is electronically controlled... and it is possible that in cold conditions, the pressure is intentionally reduced until it warms up... again, just thinking out loud here, I am in no way an expert on a CVT transmission.