I had a few bolts lose on my 2014 grizzly. Just the short ride on the trailer from the dealership to my job.. (5 minutes if you catch all the red lights) I had a bolt on the trailer and found it was for the front fender, the other side was lose. Later that day after I unloaded it, I found one of the 10mm that held on the front plastic skid plate, just under the front bumper had also fallen out... Never to be found..
I chalked it up the it being assembled at the dealership. Some tech probably fit the panels loose and overlooked them.. That was the only problem I had on my grizzly in the year that I owned it..
I haven't found a screw loose on the wolverine, I suspect that's because it's so new the tech doing finally assembly had to go by the book, and didn't get complacent as he'd likely assembled 100's of grizzly before.