2012 Rancher 420ES Running Rough??

My 2012 Rancher 420ES, 4×4, just started running strange. It has less than 100 hrs total time on it. I have noticed that after it warms up, and operating at slow speeds, usually in 2nd or 3rd gear it begins to cut out like there’s water in the fuel or it’s just not getting enough fuel. I also noticed that I can feel the heat coming off the engine from the riding position. The overheat light doesn’t come on and the electric fan is operating. This problem does not exist when I’m out on the open road going fast in the higher gears. If anyone else has experienced this with their Rancher, please chime in and let me know what the fix is…Thanks!!!