Some advice on 2015 Honda rubicon

I have recently purchased a new Honda rubicon. I love the bike but twice now after doing some water and mud riding my air box had water in it. Now the water I was in was not very deep at all . Not near the gas tank. I have no mods done yet as of snorkel or vent lines. My concern is where is the water coming in from ? Do you think it is from the breather pipe from air box ex. Water splashing up and coming in. Or is it from vent lines? My wife is riding the 420 same stuff and no water? Any advice . I know I will probably be installing snorkel and vent lines just for peice of mind but not to excited about water. Thanks I appreciate the help