Have you checked on a possible warranty fix?
Assuming that you have checked the warranty, and had no luck. The gurgling makes me wonder if there's air in the system.
The very first thing I do when I acquire any kind of new equipment. Is to buy a shop service manual from the dealership. Not the useless paperwork that comes with it. But the one the factory technician uses at the dealership for mechanical reference. You'll need it eventually, and they're hard to find after a machine is several years old. So get it now. Yes they're probably close to eighty bucks for a paper version. But it's several hundred pages, and contains EVERYTHING you could ever need to know about anything mechanical on that machine. Troubleshooting, torque values, how to test the sensors, switches etc. And would probably cover the issue you're having now.
As to checking for air in the system. On some UTVs, there's a bleed screw for the coolant. Others have to be bled through the top of the radiator.
A bad water pump, or heat sensor could also be a possibility. But making sure there's no air in the system is a fairly simple thing to do. Even though it's a fairly new machine, that's probably never had the cooling system apart. And shows no signs of ever having had a leak. The chances of air in the system are slim but that's where I'd probably start. Next would be the water pump.